The LIUniverse with Dr. Charles Liu

How did the universe evolve, and more importantly, how might it end? To find out, Dr. Charles Liu and co-host Allen Liu welcome theoretical cosmologist and astrophysicist, Dr. Katie Mack, author of the recently published book, “The End of Everything (Astrophysically Speaking).” In Part 2, we look at dark matter, Gravitational Memory Effect, and more. (You can listen to Part 1 here.)

We dive right in with a question from David: “I was wondering if any physicists have looked into the idea that the “empty” space in an atom is actually “filled” with dark matter. What experiments could be done to prove or disprove this hypothesis?”

In order to answer David, first Katie explains the science supporting the idea that dark matter exists, including gravitational lensing and other evidence. The fact that there are indications of dark matter in areas where there is sparse regular matter suggests that dark matter is an entirely different kind of particle. Katie describes many of the ways that that dark matter is unrelated to the empty space in atoms, including the fact that dark matter has no real interaction with atoms at all.

Chuck asks whether the amount of dark matter still holds the key to how the universe evolves as he was taught or have new understandings made it entirely irrelevant? Katie explains that dark energy has replaced dark matter in importance, and that’s what’s making the universe expand faster. But we really don’t know what it is, or what it’s doing, or even if it will remain constant.

Our next question comes from Aileen Balderas: “I recently read about something called the Gravitational Memory Effect. This talks about how space remembers certain things. Gravitational wave signals have the power to make it so that the universe remembers what happens to it. How can scientists say that the universe is able to remember things?”

Katie unpacks this fascinating phenomenon which she only learned about five years ago. It turns out that, as Chuck puts it, “The universe has memory the way that memory foam has memory, not like the way elephants have memory.”

Chuck asks Katie about flying planes, which she learned to do in late 2020 during the pandemic, after her book came out. Talk about a lockdown hobby! Katie shares why she loves flying so much, and what she gets out of it. And while she doesn’t own her own plane, she has a share in a single engine airplane with 4 other people.

Chuck also asks the inevitable question: Star Trek or Star Wars? Katie’s answer: Star Trek!

We end the show with Katie describing what she’s doing at The Perimeter Institute, an independent research institute that’s dedicated to stretch the boundaries of our understanding of physics in areas like cosmology, particle physics, quantum information and various areas of theoretical physics. Katie’s been working with them to create some short videos. Check out Perimeter Institute for Theoretical Physics on YouTube to watch "Quantum Physics 101" and "Cosmology 101."

If you’d like to know more about Dr. Kathryn Mack and her work, check out her website, https://www.astrokatie.com/ where you can also sign up for her newsletter, “Watch this Spacetime.” You can also find her on Bluesky at astrokatie.com, Instagram and TikTok at @astrokatiemack, and Twitter (X), YouTube, and Facebook at @astrokatie.

You can also find Katie on John Green’s “Crash Course Pods: The Universe” on Complexly, YouTube, Spotify, Simplecast and more.

We hope you enjoy this episode of The LIUniverse, and, if you do, please support us on Patreon.

Credits for Images Used in this Episode:

• Galaxy group "Stephan's Quintet" seen by NASA's James Webb Space Telescope – NASA, ESA, CSA, and STScI

#TheLIUniverse #CharlesLiu #AllenLiu #SciencePodcast #AstronomyPodcast  #DarkMatter #DarkEnergy #UniversalExpansion #BlackHoles #EarlyUniverse #Spacetime #Physics #Astrophysics #Cosmology #GravitationalMemoryEffect #GravitationalWaves

How did the universe evolve, and more importantly, how might it end? To find out, Dr. Charles Liu and co-host Allen Liu welcome theoretical cosmologist and astrophysicist, Dr. Katie Mack, author of the recently published book, “The End of Everything (Astrophysically Speaking).” You’re going to need your thinking caps for this episode, because the trio get into some pretty intense and complex concepts in physics and astrophysics.

We start off this episode hearing why Katie, who grew up under the starless pink skies in LA, embarked on her journey to explore the very beginnings of existence itself. It turns out, it wasn’t the constellations or “pretty space pictures” that drew her to astrophysics, but the fact that all of the really cool, mindbending questions and extreme physics were related to stuff that happens in space like black holes and spacetime and “The Big Bang.”

For the day’s joyfully cool cosmic thing. Chuck, who studies Observational Galaxy Evolution, brings up a paper recently published in the Astrophysical Journal by Anna de Graaff et al, about the discovery, using the James Webb Space telescope, of a group of 13-billion-year-old dwarf galaxies with an unusually large amount of dark matter inside them compared to modern day galaxies. The researchers then used the Illustris cosmological simulation of galaxy formation to evolve those galaxies and found that they would end up with a percentage of dark matter that is consistent with dwarf galaxies today.

Katie talks about the value of simulations in the study of the galaxies and the early universe, especially as the simulations get better at exploring more physics, like Illustris does. The kinds of simulations she works with, though, are more simple models designed to capture the essential physics of galactic evolution.

She’s currently studying the possibility of dark matter annihilation in the early universe and what that would mean in terms of interacting with gas and energy as galaxies evolve. (At least, we think that’s what Katie’s talking about!)

Then it’s time for our first cosmological question for Katie. Ellis asks, “What’s your opinion on Block Universe theory?” Katie explains how the Block Universe theory attempts to model the past, present and future of spacetime, and how every point in space and time exists at the same time. (Again, we think that’s what she’s talking about!)

You’ll hear about physics equations that look the same forward and backward in time, the Second Law of Thermodynamics, relativity, causality, predetermination, the limits of observation, and the meaning of time itself.

Next, Chuck asks Katie about her book, “The End of Everything” and how she thinks the universe might end. The two discuss string theory, bouncing membranes, the ekpyrotic model of the universe, and other cyclical cosmological models. Katie shares how people often respond to her book from a theological perspective, including the idea of cyclical universes in religion.

Finally, this episode addresses the confluence of science, philosophy and faith, looking at life and death, religion and the divine, personal beliefs and the need many people have to find meaning in existence and possibly even objective truth.

Like we said, thinking caps! And that’s just Part 1. Join us in two weeks for the conclusion to our interview with Katie.

If you’d like to know more about Dr. Kathryn Mack and her work, check out her website, https://www.astrokatie.com/. You can also find her on Instagram and TikTok @astrokatiemack, and Twitter (X), YouTube, and Facebook @astrokatie.

We hope you enjoy this episode of The LIUniverse, and, if you do, please support us on Patreon.

Credits for Images Used in this Episode:

• TNG simulation (lines and shade) versus observations (symbols) – de Graaff et al. 2024

#TheLIUniverse #CharlesLiu #AllenLiu #SciencePodcast #AstronomyPodcast #ObservationalGalaxyEvolution #DwarfGalaxies #DarkMatter #Illustris #CosmologicalSimulation #GalaxyFormation #GalacticEvolution #Galaxies #BlackHoles #EarlyUniverse #DarkMatterAnnihilation #BlockUniverseTheory #Spacetime #SecondLawOfThermodynamics #Physics #Astrophysics #StringTheory #BouncingMembranes #EkpyroticModelOfTheUniverse #CyclicalModels #Cosmology #Theology #Philosophy

How do you go from a small town in Colorado to being a scientist-astronaut candidate in Australia? And how can you make space accessible for disabled astronauts? To find out, Dr. Charles Liu and co-host Allen Liu welcome scientist-astronaut candidate Celene Shimmen.

As always, though, we start off with the day’s joyfully cool cosmic thing, the new study using the James Webb Space Telescope that disproves the detection of tryptophan, a complex amino acid, in the interstellar cloud IC 348. Or, as Chuck jokes, no sleepy turkeys in space.

Then we get to meet Celene Shimmen, who is a scientist-astronaut candidate in Australia. She’s a physical therapy student who is already putting her research to work in the space industry.

Celene describes how she recently designed and implemented the Lower Extremity Motor Coordination Test in Microgravity for AstroAccess, a project she works with dedicated to promoting disability inclusion in human space exploration by paving the way for disabled astronauts. (You may remember Cady Coleman talking about working with AstroAccess in our recent episode, Sharing Space with Astronaut Cady Coleman, Part 1.

You’ll hear about Celene’s acceptance into the scientist-astronaut training program for suborbital missions with the International Institute of Astronautical Sciences, beginning in 2023. She tells us about her upcoming parabolic flight where she’ll be the principal investigator testing balance differences after acute exposure to weightlessness. Chuck asks whether the “Vomit Comet” is aptly named – Celene explains that she’ll have to let us know, since her upcoming flight will have 16 periods of microgravity.

Our first question comes from Anne, who asks, “What are some psychological or physical traits that make for a good astronaut?” Celene highlights the importance of training for strength, endurance, balance, and cardiovascular fitness, especially for upcoming, long-term missions on the moon. It turns out that while the moon has lower gravity, the encumbrance of spacesuits requires greater strength and endurance. Allen explains that lesser gravity doesn’t mitigate some aspects of force and inertia that also require physical strength.

Celene describes the psychological aspects of being an astronaut, and the need for mental resilience to cope with isolation and stressful situations, as well as problem solving skills and the ability to work as part of a team.

You’ll also find out about Celene’s journey from growing up in a single-wide trailer in a town of 1000 residents in Colorado to studying hospitality in the Disney College Program in Florida, where she met her Australian husband. After watching “First Man”, the movie about Neil Armstrong, Celene decided she wanted to get into the space program. She applied to and was accepted by the Melbourne Space Program, working on a nano-satellite program. She also helped a humanoid robot take its first step, which inspired her to get involved with physiotherapy and the human body in space.

Our next question is from “anonymous”: What part of the human body is most vulnerable in space? Celene explains that extended exposure to microgravity leads to muscle atrophy and bone density loss, which is still a big issue even with ongoing exercise. Even just a 14-day stay in space leaves returning astronauts with muscle weakness.

Finally, we hear about Celene’s desire to be deployed to the moon, should the opportunity arise. Upcoming lunar missions to the moon will likely last about 30 days each, including 7 days of activity on the lunar surface.

If you’d like to reach out to Celene and chat, you can follow her on Instagram @spaceptcelene and on LinkedIn and Facebook as Celene Shimmen.

You can also find out more about AstroAccess here.

We hope you enjoy this episode of The LIUniverse, and, if you do, please support us on Patreon.

Credits for Images Used in this Episode:

– JWST image of IC 348, a star cluster wreathed in dusty gas. – NASA, ESA, CSA, STScI, Kevin Luhman (PSU), Catarina Alves de Oliveira (ESA)

– The different gravity phases during a parabolic flight. – ESA

– 2013 parabolic flight for astronaut trainees on a NASA C-9 aircraft – NASA

– Astronaut Jim Irwin at the Apollo 15 mission’s Hadley-Apennine lunar landing site. – NASA

– Humanoid Robot developed by students in the Melbourne Space Program – University of Melbourne, Australia

– Participants in NASA’s 30-day bed rest study must maintain a six-degree head-down tilt at all times. – NASA

– Concept animation of NASA Artemis astronauts exploring the lunar South Pole. – NASA

#TheLIUniverse #CharlesLiu #AllenLiu #SciencePodcast #AstronomyPodcast #CeleneShimmen #CeleneMerazBenavente #microgravity #weightlessness #AstroAccess #JamesWebbSpaceTelescope #tryptophan #IC348 #spaceexploration #VomitComet #gravity #astronaut #astronauttraining #MelbourneSpaceProgram #physiotherapy #physicaltherapy #muscleatrophy #bonedensityloss #lunarmission #InternationalInstituteofAstronauticalSciences

We jump right back in where we left off in Part 1 of our interview with Dr. Cady Coleman, astronaut, chemist, engineer, flautist, and most recently, the author of “Sharing Space: An Astronaut's Guide to Mission, Wonder, and Making Change.” (If you missed it, listen to Part 1 here.) 

Chuck asks Cady to tell us more about NASA’s decision to not include small and extra-large spacesuits to “save space.” She explains how, a few months later, they reinstated the extra-large suits, but not the small suits that affected about a third of the women, and the serious impact that decision had.

Chuck and Cady discuss the importance of diverse perspectives in the exploration of space. And then Cady offers her ideas about how to change the world for the better and the importance of doing what you can to help the people who come next. You’ll hear about astronaut Ron Garan and his nonprofit’s efforts to provide millions of filter straws to allow people in Africa to have access to safe, clean water. And you’ll hear about how you can purposefully shift your own perspectives.

For Part 2’s first question, Anne W. a student at “The School Without Walls” in Washington, D.C., asks, “What are some common reasons as to why people don’t become astronauts after starting training?” Cady explains why that rarely happens, mostly due the quality of the candidates who make it that far. But Cady then talks about why some people who should get selected to become astronauts don’t, and she shares some of her reasoning for the applicants she’s selected. The reason Cady stresses most is that if you don’t show them who you really are on the application, they cannot pick you. And she also explains the surprising reason why some astronauts who have flown already don’t get selected to go again.

The conversation circles back to diversity and bias in NASA. Allen shares the story of test pilot Ed Dwight, which he believes reflects some racial bias. Cady, who knew Ed, talks about some of the political factors in the choice, but also what an amazing artist he became. She reflects on the importance of Sally Ride in her life, and wonders what would have happened if the original Mercury 13 had been allowed to become astronauts back in the 60s.

Charles and Allen bring up Valentina Tereshkova, the cosmonaut who became the first woman in space in 1963, and how it took until 1983 for Sally Ride to take her famous flight as the first American woman. And yes, Cady does bring up “For All Mankind!” and “the role that art and storytelling can play to move the needle a little faster.”

For our final question, Allen shares a question from our podcast producer Leslie M., who asks, “Would materials behave differently in a different universe?” Cady, a chemical engineer who studied chemistry at M.I.T. and then got her Ph.D. degree in polymer science and engineering from the University of Massachusetts Amherst, says yes. And that kicks off a discussion of the impact of different physics on different materials. But Cady also talks about the importance of using the compelling nature of space to drive kids to want to become more educated and to improve life here on Earth.

In addition to Cady’s new book, Cady was recently in a documentary on PBS, Amazon Prime, and Apple TV, along with her family, NASA personnel and other astronauts. It’s called “Space: The Longest Goodbye” and it’s about how we are going to send people to Mars and put the human into human spaceflight.

You can find out more about her new book and everything else she’s up to on her website, https://www.cadycoleman.com/.

To find the kind of bookstore you love that carries “Sharing Space: An Astronaut's Guide to Mission, Wonder, and Making Change,” you can go to www.bookshop.org.

Follow Cady on Instagram, Twitter (X), and Threads: @astro_cady.

And please be sure to check out People Love Art, which shares 50% of their profits with their artists and donates 10% to causes of the artist’s choice: https://peopleloveart.com/. 

You can also find out more about AstroAccess (mentioned in Part 1) here: https://astroaccess.org/.

(Please note that The LIUniverse receives no compensation for these links and mentions. We just like what they’re doing in the world!)

We hope you enjoy this episode of The LIUniverse, and, if you do, please support us on Patreon.

Credits for Images Used in this Episode:

• 3 crew members in a Soyuz space capsule – NASA/Bill Ingalls, Public Domain

#TheLIUniverse #CharlesLiu #AllenLiu #SciencePodcast #AstronomyPodcast #CadyColeman #NASA #astronaut #SpaceShuttle #ISS #SharingSpace #spacewalk #PeopleLoveArt #RonGaran #EileenCollins #EdDwight #JerrieCobb #Mercury13 #SpaceTheLongestGoodbye #SallyRide #ForAllMankind

What is the overview effect? Why is slow fast when you’re spacewalking? And what would happen to Chuck and Allen’s hair in space?

To get the answers to these and other questions, Dr. Charles Liu and co-host Allen Liu welcome back astronaut, chemist, engineer, flautist, and most recently, the author of “Sharing Space: An Astronaut's Guide to Mission, Wonder, and Making Change,” Dr. Cady Coleman.

As always, though, we start off with the day’s joyfully cool cosmic thing, a micrometeorite pit 2 microns across found on a tiny volcanic glass beat that was part of the lunar regolith collected by China’s Chang'e 5 Lunar Sample-Return Mission. On the surface of the pit is a trace of Di-Titanium Oxide (TiO2) in mineral form that can’t exist on Earth.

Cady, who is a material scientist, talks about how this new discovery may not be as “new” as it seems, because we have much better detection technology for detecting it in lunar samples than we had during the Apollo lunar missions. She also explains how creating materials in space, unfettered by gravity, can be very different than here on Earth. She recounts the liquid physics experiments they did on her first Space Shuttle mission and how they could lead to innovations in the development of space toilets, among other things. (To find out more about space toilets and how to pee and poop in space, check out Appendix 1 of Cady’s new book!)

Our first student question today comes from Violetta, a student at “The School Without Walls” in Washington, D.C., who asks, “What is your outlook on the overview effect? Cady defines the effect, and how it changes people who go into space and see the planet below them. For her, she explains, “I knew I was going to go to space, and I just thought I’d be going to a different place. Then, when I got up there, I looked back at Earth, I still felt at home. It’s just that the whole place felt like home, and home was closer than I thought.”

Allen follows up Violetta’s question for Cady with one from Anne W., a fellow student, who asks, “How is Space?” Cady’s answer: “Space is Awesome!” She explains that here on Earth, we grow up with limits on what we can do, how far we can run, or how fast. But, in space, we’re constantly discovering more things that you can do: ”I love the flying.”

You’ll hear Cady share what it was like in space during her two Space Shuttle missions and 6 months on the International Space Station as a member of Expedition 26/27. She talks about her work schedules and experimentation and the self-induced tendency to work too much, to more personal activities like looking out the window, social media posting, and even shopping – or ordering a pizza from Domino’s like Ron Garan did, hoping to earn a free pizza since there was no way they could deliver it in 30 minutes or less! What would she do differently if she went back? Sleep more and take better care of herself, which she reminds us in equally important to all of us here on Earth.

Next, Chuck turns to some of the big ideas in Cady’s book, starting with “Slow is fast.” While holding up the very first copy of the book Cady ever got, she talks about spacewalking and how haste can be problematic. She takes issue with the phrase, “There’s no I in TEAM” and how in real life, it’s actually about what each individual member brings to the team.

Part One of our interview with Cady ends with a discussion of the t-shirt she’s wearing from “People Love Art” who she met through her work with AstroAccess, a project dedicated to promoting disability inclusion in human space exploration by paving the way for disabled astronauts.

There’s plenty more of our interview with Cady, so please tune in in two weeks for Part 2. But, until then, you can find out more about her new book and everything else she’s up to on her website: https://www.cadycoleman.com/.

You can also find out more about AstroAccess here.

And please be sure to check out People Love Art, which shares 50% of their profits with their artists and donates 10% to causes of the artist’s choice.

(Please note that The LIUniverse receives no compensation for these links and mentions. We just like what they’re doing in the world!)

We hope you enjoy this episode of The LIUniverse, and, if you do, please support us on Patreon.

Credits for Images Used in this Episode:

– Micrometeorite pit on lunar sample – Xiaojia Zeng et. al., CC BY 4.0

– Cady working on liquid experiments on the Space Shuttle – NASA, Public Domain

– Tracy Caldwell Dyson viewing Earth from the ISS – NASA, Public Domain

– Cady at work on the Shuttle – NASA, Public Domain

#TheLIUniverse #CharlesLiu #AllenLiu #SciencePodcast #AstronomyPodcast #CadyColeman #NASA #astronaut #SpaceShuttle #ISS #SharingSpace #spacewalk #Change5 #LunarSampleReturnMission #DiTitaniumOxide #liquidphysics #Slowisfast #AstroAccess #PeopleLoveArt

Does sound travel faster in space? Is the multiverse theory true? Can gravity escape a black hole? In our latest episode of our popular “Chuck GPT” series, Dr. Charles Liu and co-host Allen Liu welcome our Social Media/Patreon Community Director Stacey Severn to answer fan questions collected from Patreon patrons, students, Facebook and YouTube.

As always, though, we start off with the day’s joyfully cool cosmic thing: the recently released Euclid space telescope image of galactic cluster Abell 2390, which is about 2.7 billion light years away from Earth, in which more than 50,000 galaxies are visible. You’ll also hear about the Coma Cluster, the Virgo Cluster, the closest galactic cluster to us, and the planned Nancy Grace Roman Space Telescope.

Our first fan question comes from Emil R. on Patreon: “I wonder what would happen, if you tied one end of a really, really long rope to the International Space Station and have the other end hang down all the way down in the Earth's atmosphere. Would the current speed of the ISS circling the globe counteract the fact that the rope is in the atmosphere and experiencing drag? Would people on airplanes be able to see a rope swing by? Would the end of the rope on the ISS be stretched out or loose, and would it drag the ISS down in its orbit?”

Allen, who loves this question, addresses orbital velocity, drag, momentum, conservation of energy, space tethers, sky hooks, space elevators, and the ISS. Chuck talks about having seen the Tethered Satellite System trailing behind the Space Shuttle through the telescope he was using for his doctoral dissertation in the 1990s!

Our first student question comes from Michael L.: “Is the multiverse theory true?” Chuck’s answer involves eternal inflation, bubble universes, quantum mechanics, many worlds, and, somehow, Schrödinger’s cat.

From Facebook, Steven B. asks: “We all know that warp drive is still science fiction. But what is developing with other kinds of propulsion? Have we reached the limit of chemical propellants? What is happening with ion drives and nuclear systems?” Allen reviews the state of the art, including Ad Astra’s VASIMIR engine, which we covered in our 2-part episode Star Trucking with Franklin Chang-Diaz and Miranda Chang.

Our next student question is from Roberto J.: “How was gravity created?” Chuck says that while we just don’t know for certain, gravity may have come into existence during the “Plank time” at the very start of our universe before cosmic inflation began.

YouTuber @UnexpectedBooks asks, “How can gravity be “transmitted” via gravitons? It seems that a black hole would have no mass, because gravitons, like everything else, couldn’t escape it.” Chuck explains that even though definitely black holes have mass, if gravitons exist, they must be able to leave the event horizon, and Allen points out that gravitational waves do just that.

Our last student question is from Omar: “Does sound travel faster in space?” Chuck describes how sound waves travel, and why there’s enough particulate matter in space to still allow it, possibly even faster than here on Earth.

We end on a Patreon question from Eric S.: “The Heisenberg uncertainty principle is a casualty of the particular mathematics we have used to explore the quantum world. If we were to adjust those mathematics to a less consistent but more complete axiomatic viewpoint, could it be possible to 'see deeper'?” Chuck and Allen’s answer involves high-order math, the Heisenberg uncertainty principle, string theory and quantum mechanics.

We hope you enjoy this episode of The LIUniverse, and, if you do, please support us on Patreon.

Credits for Images This Episode:

– Euclid telescope image of Abell 2390 – ESA/Euclid/Euclid Consortium/NASA, image processing by J.-C. Cuillandre (CEA Paris-Saclay), G. Anselmi, ESA license

– Virgo Cluster of Galaxies – Chris Mihos (Case Western Reserve University)/ESO, CC BY 4.0

– Coma Cluster of Galaxies – Nielander, Public Domain

– Hubble telescope image of Abell 2390 – NASA, ESA, & Johan Richard (Caltech, USA), Public Domain

– Roman Space Telescope under construction – NASA/Chris Gunn, Public Domain

– Space Elevator Artist’s concept – Andrei Sokolov

– The ISS in orbit – NASA, Public Domain

– The Tethered Satellite System – Space Shuttle – NASA, Public Domain (Image: https://commons.wikimedia.org/wiki/File:STS-46_TSS-1_fully_extended.jpg)

– Many-worlds depiction of Schrödinger’s cat – Christian Schirm, Public Domain

– NEXIS Ion thruster – Jet Propulsion Laboratory, Public Domain

– Design of NASA & DARPA’s DRACO nuclear rocket – DARPA, Public Domain

– History of the universe diagram – NASA/WMAP Science Team, Public Domain

– Artist’s animation of gravitational waves – LIGO/T. Pyle, free to use

– Fourier transform of a signal – Wawo1102, Public Domain

– Waveform of same signal – Made with Desmos, Attribution

– Wavelet (Gabor) transform of same signal – Wawo1102, Public Domain

#TheLIUniverse #CharlesLiu #AllenLiu #SciencePodcast #AstronomyPodcast  #Euclidspacetelescope #galacticcluster #Abell2390 #VirgoCluster #ComaCluster #darkmatter #darkenergy #orbitalvelocity #momentum #conservationofenergy #spacetethers #skyhooks #spaceelevators #ISS #InternationalSpaceStation #TetheredSatelliteSystem #SpaceShuttle #multiverse #theoryofthemultiverse #eternalinflation #bubbleuniverses #quantummechanics #manyworldstheory #schrodingerscat #soundwaves #blackhole #gravitons #gravity #Planktime #BigBang #Heisenberguncertaintyprinciple

Is there really a music of the spheres? And why is space so inspirational for creativity? To ponder these cosmic questions, Dr. Charles Liu and co-host Allen Liu welcome noted composer and pianist Bruce Lazarus.

As always, though, we start off with the day’s joyfully cool cosmic thing, this time in honor of our guest: the fact that the movie “Oppenheimer” won the Academy Award for Best Original Score. Chuck mentions some other incredible musical scores, especially John William’s soundtrack to “Star Wars.” Bruce points out that Williams also did the theme song and soundtrack to the 1960s TV series, “Lost In Space.” And of course, his soundtracks for “Jurassic Park,” “Raiders of the Lost Ark,” “E.T. the Extra-Terrestrial,” and “Close Encounters of the Third Kind.”

Bruce has composed many musical pieces inspired by and about the cosmos, including

“Musical Explorations of Messier Star Clusters and Nebulae” and “Starry Messenger.”

He talks about how the early U.S. space program and the Mercury 7, and the U.S. World’s Fair in 1964 inspired him. And while he got away from space-themed music for a while after his time at Juilliard in the 1970s, Bruce estimates that about two thirds of his work over the last 20 years has been astronomy themed. He talks about being inspired by other musical works, from science fiction movie soundtracks like “Arrival” to a few classical pieces like “Colors of the Celestial City” and “Visions from Beyond” by Olivier Messiaen.

For our first student question, Ariella asks, “Is there really a music of the spheres?” To answer, Bruce quotes the 5th Century Roman philosopher Boethius, who wrote about how everything is vibrating, so everything has sound. We then listen to a portion of Bruce Lazarus’s piece, “Boethius Said.” Allen talks about how many aspects of our existence involve vibration and sound while Chuck brings up the Cosmic Microwave Background and Gravitational Wave Background.

Bruce talks about his cycle of 14 pieces for the solo piano inspired by the most commonly referenced Hubble images of the celestial objects found in the Messier Catalog (not to be confused with Messiaen), including Andromeda Galaxy (M31), Ring Nebula (M57), Eagle Nebula (M16), Sombrero Galaxy (M104), and the Pleiades (M45).

Our next student question comes from Gino, who asks, “Did you ever want to be a scientist before you became a composer?” Bruce explains that he’s always liked building things, so he began building music the way he’d built model airplanes, and at 14 years old decided he wanted to be a composer and also focused on the piano, for both composing and making money! The trio ends up discussing the original “Tron” – and believe it or not, it’s Bruce who brings it up, not our Geek-in-Chief Chuck!

Our last student question comes from Wally, who asks, “Why is space the most inspirational thing to you when writing music?” Bruce describes how space has been a large part of his life for as long as he can remember. He talks about the Veil Nebula, and why he didn’t include it in his Messier cycle. He also shares his experience watching the April 8, 2024 total solar eclipse, and how the reality of seeing it with his own eyes impacted him unexpectedly.

If you’d like to know more about Bruce, you can visit his website at www.brucelazaruscomposer.com.

We hope you enjoy this episode of The LIUniverse, and, if you do, please support us on Patreon.

Credits for Images Used in this Episode:

– NASA’s first astronauts, the “Mercury 7” – NASA, Public Domain

– Olivier Messiaen – Dutch National Archives, Public Domain

– Andromeda Galaxy (M31) – Kees Scherer, Public Domain

– Ring Nebula (M57) – NASA, ESA, and C. Robert O’Dell, Public Domain

– Eagle Nebula (M16) – NASA, ESA, and the Hubble Heritage Team (STScI/AURA), Public Domain

– Sombrero Galaxy (M104) – NASA/ESA and The Hubble Heritage Team (STScI/AURA), Public Domain

– Pleiades (M45) – NASA, ESA, AURA/Caltech, Palomar Observatory, Public Domain

– Crab Nebula (M1) – NASA, ESA, J. Hester and A. Loll, Public Domain

– Veil Nebula –  Giuseppe Donatiello

– The April 8 2024 Total Solar Eclipse – NASA Headquarters / NASA/Keegan Barber

Credits for Music Used in this Episode:

– “Boethius Said”; Original Lyrics by Boethius, Music & Lyrics by Bruce Lazarus, performed by Cantabile Chamber Chorale, Directed by Rebecca Scott. Used with permission from Bruce Lazarus.

– “M1 Crab Nebula” from “Musical Explorations of the Messier Catalogue of Star Clusters and Nebulae.” Composed and performed by Bruce Lazarus. Used with permission from Bruce Lazarus.

#TheLIUniverse #CharlesLiu #AllenLiu #SciencePodcast #AstronomyPodcast  #BruceLazarus #MusicoftheSpheres #CharlesMessier #MessierCatalog #Boethius #BoethiusSaid #MusicalExplorationsoftheMessierCatalogue #StarClusters #Nebulae #ColorsoftheCelestialCity #OlivierMessiaen #CelestialObjects #HubbleSpaceTelescope #SolarEclipse

Do gravitons exist? What are blazars? How did our universe begin? To grapple with questions on a cosmological scale, Dr. Charles Liu and co-host Allen Liu welcome Dr. Ron Gamble, a theoretical astrophysicist at the NASA Goddard Space Flight Center.

As always, though, we start off with the day’s joyfully cool cosmic thing, the gravitational wave background. Luckily, we have the “cosmological - gravitational wave - black hole meister dude” Ron on board as our expert to unpack the concept. Ron’s explanation involves pulsars, pulsar timing arrays, and gravitational waves. You’ll hear about how ripples in spacetime can help us date the age. Ron compares the gravitational wave background to the cosmic microwave background, how both compare to sound waves, and how we decipher them.

We interrupt Ron’s flow for an audience question from Kelly for Dr. Gamble: Do gravitons exist? Ron explains why gravitons should exist for the force of gravity the same way that particles exist for each of the other fundamental forces. (And yes, bosons and fermions get discussed.)

Next, Chuck asks Ron about his journey to NASA, a path that began when he was 4 years old with a question and continued as a search for answers to this day. You’ll hear how he learned grad school level math 2 years before grad school so he’d be ready when he needed it to study non-linear gravitational wave theory. He explains why he had to relearn how to learn math and science, and how, after that, everything else was just like “building Legos.”

He's currently studying little understood objects called “black hole lasers” – relativistic black hole jets, or blazars. You’ll hear all about them, as well as learning about the work of Roger Penrose and Dr. Reva Kay Williams, the first black woman to get a PhD in theoretical astrophysics in the U.S. which lead to a Nobel Prize in Physics –unfortunately awarded only to Penrose, as Chuck and Ron discuss.

Our next cosmological question comes from Nicholas, who asks, “Is the big bang theory in trouble?” Not in trouble, Ron says, but incomplete. We have a pretty good idea of cosmology, but we’re still testing it, and we don’t know exactly what happened or what we might find.

Ron is also a wide-ranging artist, and he shows off some of his work on the walls of his office, from artistic depictions of equations to visions of urban decay. (Sorry, podcast listeners – but Chuck does his best to describe what they look like!) If you’re interested in his work, you can find it in his new online store at www.theartoftheory.com.

Finally, Chuck asks about what it’s like to be an artist and a NASA scientist. Ron talks about his role as the Director of the NASA Cosmic Pathfinders Program.

You can keep up with Ron on TikTok, Instagram and Twitter (X) at @dr_gamble21. Or you can visit his website at www.theoreticallydrgamble.com.

We hope you enjoy this episode of The LIUniverse, and, if you do, please support us on Patreon.

Credits for Images Used in this Episode:

– Animation of a Pulsar – NASA SVS, Public domain

– The planned Laser Interferometer Space Antenna (LISA) – NASA, Public Domain

– The four fundamental forces – NASA, Public Domain

– A 4x4 matrix representing a tensor – Public Domain text

– A Christoffel Symbol – Public Domain text

– Illustration of a black hole jet – NASA/JPL-Caltech, Public Domain

– Dr. Reva Kay Williams – (Fair Use)

– A cosmology timeline of the universe – NASA/WMAP Science Team, Public Domain

Volcanoes in space...supervolcanoes here on Earth... and lava lakes everywhere! To get an expert opinion on eruptions, Dr. Charles Liu and co-host Allen Liu welcome Dr. Sam Tramontano, a Post-Doctoral researcher in geology and Earth sciences at The American Museum of Natural History.

As always, though, we start off with the day’s joyfully cool cosmic thing, the Juno spacecraft’s two recent close passes (under 1000 miles) of Jupiter’s moon Io and the amazing images of volcanic activity and Io’s lava lake “Loki Patera” with an island in its center!

Allen and Samantha dive into the fascinating and little-understood mechanics of lava lakes, which continue to remain liquid at their surface and persist for years at a time despite tidal fluctuations. You’ll hear about the Erta Ale lava lake in Ethiopia and the Kilauea lava lake in Hawaii.

For our first audience question, Ellis asks, “Are there volcanoes on Venus?” Sam explains how studying volcanism on Venus is a promising avenue but that we don’t yet have a clear answer to that question. She talks about how scientists are only now untangling the Magellan mission data that suggests geologic activity on Venus.

You’ll find out how Sam, a sax player who went to Fiorello H. LaGuardia High School of Music & Art and Performing Arts (the school in Fame), ended up falling in love with geology and never looking back. And you’ll hear all about the interesting geology – including billion-year-old rocks and “mica book crystals” – that you can find in and around New York City.

Our next audience question is from Bianca, who asks, “How did global warming begin?” Samantha explains the difference between normal climate cycles and the climate crisis we’re in now as a result of human activity. We discuss the impact of volcanic super-eruptions on atmospheric CO2, including prehistoric eruptions like the three Yellowstone eruptions and the rifting of the Atlantic ocean and splitting of Pangaea. Dr. Tramontano, a self-described “Ash Lady” who is currently studying active volcanoes on Iceland’s Reykanes Peninsula, explains how we would have at least a year’s notice if something that large were to happen in the future. We end the episode with Sam describing what eruptions and cooling lava flows sound like.

If you’d like to know more about Sam, you can follow her on Instagram @samtramrox and X @samtramrox. And if you’re a young undergraduate in Earth Sciences, you should check out her YouTube channel @EarthOpticsVideos to see what rocks look like under the microscope.

We hope you enjoy this episode of The LIUniverse, and, if you do, please support us on Patreon.

Credits for Images Used in this Episode:

– Columnar basalts in the Palisades – Mark Wyman, CC BY 2.0

– The Staten Island Ferry – Estormiz, Public domain

– Jupiter and Io seen by the Juno spacecraft – Andrea Luck, CC BY 2.0

– Io’s lava lake “Loki Patera” and its island – Cropped from NASA/JPL/SwRI/MSSS/Simeon Schmauß, CC BY 3.0

– Erta Ale lava lake in Ethiopia – Alton Chang, CC BY 3.0

– Magellan Spacecraft leaving the Space Shuttle – NASA, Public Domain

– Rocks near Orchard Beach – Peter Romano, Public Domain

– Ash fall from the “Lava Creek” Yellowstone eruption – Metrodyne, Public Domain

– Volcanic calderas in Yellowstone – National Park Service, Public Domain

– January Eruption on Iceland’s Reykjanes Peninsula – Veðurstofa Íslands, Attribution

#TheLIUniverse #CharlesLiu #AllenLiu #SciencePodcast #AstronomyPodcast #Palisades #SuperVolcano #SpaceVolcano #EarthScience #Geology #Venus #Io #ErtaAle #Kilauea #LavaLake #LokiPatera #Iceland #ReykanesPeninsula #VolcanicEruption #YellowstoneEruption #Volcanism

How does the brain actually work? And is there anything we can do when it doesn’t? To find out, Dr. Charles Liu and co-host Allen Liu welcome Dr. Nicki Driscoll, CTO and Co-Founder of NeuroBionics.

As always, though, we start off with the day’s joyfully cool cosmic thing, the recently announced discovery of Super-Earth TOI-715 b that is within its star’s habitable zone. It’s roughly 1.5x the diameter of Earth and orbits an M-4 Red Dwarf star in a zone where liquid water could exist and be stable on the surface of the planet. And where there’s liquid water, there is the possibility for life.

Charles and Nicki quickly move from the search for intelligent to the actual activities inside the brain itself that give rise to consciousness. As Nicki points out, as incredible as it is that our brains can ponder what’s out there, it’s equally incredible how little we know about what’s inside them... especially when things go wrong in the brain.

Dr. Driscoll explains stochastic processes and brain complexity, with over a billion neurons, each behaving like its own little computer with thousands of connections with other neurons called synapses.

You’ll hear about white matter and gray matter, and what they have in common with the interstate highway system. Nicki points out how humans frequently create systems that mirror efficient systems found in nature. Chuck points out that when we map the large scale structure of the universe, including the cosmic background radiation and dark matter, it looks like a brain!

Then it’s time for a question for Nicki from the audience. Madison H. asks, “What is the most interesting thing about the brain that impacts the way humans think?” Nicki settles on the fact that the brain uses multiple mechanisms for signaling, from electrical signals in the neurons to chemical signaling via neurotransmitters and chemicals in the brain, and how they can vary due to minute differences.

Nicki explains the field of neurotechnology, where her company NeuroBionics creates devices that allow us to interact with the brain, recording and even stimulating activity in the brain. She describes the two different areas of neurotechnology.

The first, the domain of Elon Musk’s company Neuralink, is recording neural activity with brain computer interfaces that use electrodes to record brain activity and then try to decode that activity to try to help people with paralysis or who are unable to communicate.

The second area, which involves stimulating the brain, is called neuromodulation and is very useful for therapy for people with epilepsy and Parkinson’s disease. NeuroBionics has developed a technique for neuromodulation that doesn’t require invasive surgery by feeding very thin fiber devices into the brain through catheters in blood vessels using the same process that neurosurgeons already use in treating strokes.

Our next question comes from Elene, who asks Nicki, “Since you have your PhD, do you think it was worth it or gratifying going through that many years of schooling?” Nicki answers with a resounding yes, for herself, but explains that it depends on your career goals.

Elene also asks, “Do you think AI will ever reach a point where it will start dangerously affecting our day to day life such as job opportunities?” Charles and Nicki agree that AI is a useful tool, especially for scientists, but that the ability to generate misinformation and deep fakes is already troubling and that, like nuclear power, we should be able to maximize the positive use while minimizing the worst excesses.

The subject turns to AI and brain science in games and science fiction, and Nicki describes the first book in a series she’s reading, called “Children of Time.” In it, a character uploads their consciousness into a computer, and act which is still most decidedly in the realm of fiction. You’ll hear about the still incomplete efforts to map the 212 neurons in the brains of C. Elegans, a simple primitive worm with a simple brain structure that scientists use to study the activity of individual neurons and small quantities of synapses.

Before we run out of time, Chuck asks Nicki whether he should freeze his brain when he dies and whether supercomputers could  be used to recreate who he is – but to find out the surprising answer to that question (or perhaps not so surprising after all), you’ll need to watch or listen to the episode.

If you’d like to know more about Dr. Driscoll, follow NeuroBionics on LinkedIn or visit neurobionics.io.

We hope you enjoy this episode of The LIUniverse, and, if you do, please support us on Patreon.

Credits for Images Used in this Episode:

– Illustration of Super-Earth TOI-715 b – NASA/JPL-Caltech, Public Domain

– Map of “white matter” in the brain – Xavier Gigandet et. al. CC BY 2.5

– A growing slime mold – Christian Grenier, Public Domain

– A large-scale simulation of the universe – Andrew Pontzen and Fabio Governato, CC BY 2.0

– C. Elegans worms – ZEISS Microscopy, CC BY 2.0t

#TheLIUniverse #CharlesLiu #AllenLiu #SciencePodcast #AstronomyPodcast #neurobionics #NickiDriscoll #Stochasticprocesses #neurons #synapses #whitematter #graymatter #neuralactivity #Neuralink #braincomputerinterfaces #neuromodulation #epilepsy #Parkinsonsdisease #AI #brainscience #ChildrenofTime #CElegans #supercomputers