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- How to Defuse the Overpopulation Bomb
Thank you to Bill and Melinda Gates for supporting PBS Digital Studios. If you’d like to take a look at the 2018 Annual Letter, you can check it out here http://b-gat.es/2Cfph0j
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Uploaded 13-02-18
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Is overpopulation real? Is Earth filling up with too many humans? How many people can Earth hold, anyway? As our species approaches 8 billion, human overpopulation is a major concern for many people. How can we reduce poverty and our impact on the environment? Do we need a forced one-child policy or something? Maybe not, because when we look at the science and history, populations seem to control themselves. This week we look at all these questions and more.
READ MORE:
https://ourworldindata.org
https://www.sciencemag.org/site/special/population/
http://science.sciencemag.org/content/346/6206/234
https://www.scientificamerican.com/article/are-malthus-predicted-1798-food-shortages/
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It’s Okay To Be Smart is hosted by Joe Hanson, Ph.D.
Director: Joe Nicolosi
Writer: Joe Hanson, Ph.D.
Creative Director: David Schulte
Editor/animator: Karl Boettcher
Producer: Stephanie Noone and Amanda Fox
Produced by PBS Digital Studios
Music via APM
Stock images from Shutterstock http://www.shutterstock.com
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12 min - What Is the Most Unremarkable Thing?We’re on PATREON!Join the community: https://www.patreon.com/itsokaytobesmart↓↓↓ More info and sources below ↓↓↓We may not know it, but averages affect our lives every day. Designers and manufacturers use averages to make our houses, cars, shoes and airline seats safer and more comfortable(ish). But calculating averages is way more complicated than one might think! And as long as we are at it - let’s talk about what the most average thing in the known universe might be!SUBSCRIBE so you don’t miss a video! ►► http://bit.ly/iotbs_sub-----------High fives to all our Brain Trust Patrons:Charles Horton, JrHolly, Brett, and Ashe BullionJaap WesteraMillennial GlacierMehdi DamouBarbora BeiBurt Humburgdani bowmanDavid JohnstonBaerbel WinklerRobert YoungEric MeerKaren HaskellJoin us on Patreon!https://patreon.com/itsokaytobesmartTwitterhttp://www.twitter.com/DrJoeHansonhttp://www.twitter.com/okaytobesmartInstagramhttp://www.instagram.com/DrJoeHansonhttp://www.instagram.com/okaytobesmart
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21 min - The Science of Barbecuing!!!Science is delicious!Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/PBSDSDonateSUBSCRIBE, it's FREE! http://bit.ly/iotbs_sub↓ More info and sources below ↓Franklin BBQ: https://franklinbarbecue.com/Basic BBQ science:http://bbq.tamu.edu/bbq-science/http://amazingribs.com/tips_and_technique/meat_science.htmlChemistry smoke ring:http://amazingribs.com/tips_and_technique/mythbusting_the_smoke_ring.htmlThermodynamics of BBQ cookinghttp://amazingribs.com/tips_and_technique/thermodynamics_of_cooking.htmlThe dreaded "stall":http://amazingribs.com/tips_and_technique/the_stall.htmlDoes BBQ smoke contain carcinogens?:http://chemistry.about.com/b/2013/05/05/barbeque-carcinogens.htmJoe Hanson - Host and writerJoe Nicolosi - DirectorAmanda Fox - Producer, Spotzen IncKate Eads - Associate ProducerKatie Graham - Director of PhotographyJohn Knudsen - GafferEdited by Arts + Labor: http://arts-and-labor.com/Music: "Ouroboros" by Kevin MacLeodStock images via ShutterstockProduced by PBS Digital Studios: http://www.youtube.com/user/pbsdigitalstudios-----------Join us on Patreon!https://patreon.com/itsokaytobesmartTwitterhttp://www.twitter.com/DrJoeHansonhttp://www.twitter.com/okaytobesmartInstagramhttp://www.instagram.com/DrJoeHansonhttp://www.instagram.com/okaytobesmartMerchhttps://store.dftba.com/collections/its-okay-to-be-smartFacebookhttps://www.facebook.com/itsokaytobesmartpbs/
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11 min - Why Some of the Rainbow is AbsentWe’re on PATREON! Join the community: https://www.patreon.com/itsokaytobesmart↓↓↓ More info and sources below ↓↓↓Over 200 years ago, scientists were looking at sunlight through a prism when they noticed that part of the rainbow was missing. There were dark lines where there should have been colors. Since then, scientists have unlocked the secrets encoded in these lines, using it to uncover mind-boggling facts about the fundamental nature of our universe and about worlds light-years away.Want to build your own DIY spectrometer? Mine is a modified version of this one from @exploratorium https://www.exploratorium.edu/snacks/cd-spectroscopeAnd here's what you'll need to make one: https://amzn.to/3sbhr7CReferences: https://sites.google.com/view/whysomeoftherainbowismissing/home0:00 Fraunhofer's mystery of missing colors0:54 Playing with fire2:11 Puzzle pieces and color codes3:30 Electrons do the strangest things5:40 How to make a rainbow analyzer8:00 Using rainbows to understand the universe9:57 Life beyond Earth10:57 Final thoughtsSUBSCRIBE so you don’t miss a video! ►► http://bit.ly/iotbs_sub-----------High fives to all our Brain Trust Patrons:Holly, Brett, and Ashe BullionJaap WesteraMillennial GlacierMehdi DamouBarbora BeiBurt Humburgdani bowmanDavid JohnstonBaerbel WinklerRobert YoungEric MeerDustinKaren HaskellSupport us on Patreon!https://patreon.com/itsokaytobesmartTwitterhttp://www.twitter.com/DrJoeHansonhttp://www.twitter.com/okaytobesmartInstagramhttp://www.instagram.com/DrJoeHansonhttp://www.instagram.com/okaytobesmartMerchhttps://store.dftba.com/collections/its-okay-to-be-smartFacebookhttps://www.facebook.com/itsokaytobesmartpbs/
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15 min - How The Moon Controls Biology
Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/PBSDSDonate
Uploaded 15-11-17
This video is FULL of cool MOON biology 😏
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Organisms of all shapes and sizes synchronize their behaviors using biological clocks. Some keep pace with the daily rising and setting sun using circadian rhythms. Others use annual cycles or the changing seasons as their cue. But many animals use moonlight and Earth’s lunar cycle to run their biological clock. Do humans do the same thing, with things like menstrual cycles? This week we take a look at living by moonlight.
Menstrual cycle data courtesy of Clue app (https://helloclue.com/)
Grunion footage courtesy of KQED’s Deep Look (https://www.youtube.com/user/KQEDDeepLook) and Dr. Michael Murrie - Pepperdine University
SOURCES:
The Myth of the Moon and Menstruation: https://medium.com/clued-in/the-myth-of-the-moon-and-menstruation-f85b151e45c3
Grant, Rachel, Tim Halliday, and Elizabeth Chadwick. "Amphibians’ response to the lunar synodic cycle—a review of current knowledge, recommendations, and implications for conservation." Behavioral Ecology 24.1 (2012): 53-62.
Zhang, Lin, et al. "Dissociation of circadian and circatidal timekeeping in the marine crustacean Eurydice pulchra." Current Biology 23.19 (2013): 1863-1873.
Zantke, Juliane, et al. "Circadian and circalunar clock interactions in a marine annelid." Cell reports 5.1 (2013): 99-113.
Warren, H. B. Aspects of the behaviour of the impala male, Aepyceros melampus, during the rut. National Museums and Monuments of Rhodesia, 1974.
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It’s Okay To Be Smart is hosted by Joe Hanson, Ph.D.
Director: Joe Nicolosi
Writer: Eli Kintisch
Editor/animator: Stephen Fishman
Producer: Stephanie Noone and Amanda Fox
Produced by PBS Digital Studios
Music via APM
Stock images from Shutterstock http://www.shutterstock.com
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6 min - Why Don't Other Animals Use Glasses?Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/PBSDSDonateCheck out The Great Courses Plus: http://ow.ly/OE9y301cRfIDon’t miss our next video! SUBSCRIBE! ►► http://bit.ly/iotbs_sub↓ More info and sources below ↓Get yourself an awesome IOTBS shirt! http://dftba.com/besmartThis is a cool old movie from 1941 about how the eye works:https://archive.org/details/0586_How_the_Eye_Functions_E00456_04_22_16_00Dive deeper into the physics of vision correction with Michel van Biezen:https://www.youtube.com/playlist?list=PLX2gX-ftPVXXf2ZaG_1SXAYbVcifI6gvrMyopia boom in modern times:http://www.nature.com/news/the-myopia-boom-1.17120Limits to human vision:http://www.ncbi.nlm.nih.gov/pubmed/11019869----Have an idea for an episode or an amazing science question you want answered? Leave a comment or check us out at the links below!Like us on Facebook: http://www.facebook.com/itsokaytobesmartFollow on Twitter: http://twitter.com/okaytobesmarthttp://twitter.com/jtotheizzoeFollow on Tumblr: http://www.itsokaytobesmart.comFollow on Instagram: http://instagram.com/jtotheizzoeFollow on Snapchat: YoDrJoe-----------------It’s Okay To Be Smart is written and hosted by Joe Hanson, Ph.D.Follow me on Twitter: @jtotheizzoeProduced by PBS Digital Studios: http://www.youtube.com/user/pbsdigitalstudiosMusic via APMStock images from SciencePhoto http://www.sciencephoto.com/ and Shutterstock http://www.shutterstock.comStock footage from Videoblocks (unless otherwise noted) http://www.videoblocks.com
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9 min - Why Y Is a Vowel Through Physics (and so is W)We’re on PATREON! ►► Join the communityhttps://www.patreon.com/itsokaytobesmart↓↓↓ More info and sources below ↓↓↓Human language is an incredible thing: a combination of mouth sounds that we combine into words, sentences, poems, and constitutions. They carry meaning, emotion, and power. But underneath it all, language is really just physics. In this episode, we explore how physics is at the core of every syllable, starting with the first word most of us ever speak.Try the Pink Trombone vocal simulator! - https://experiments.withgoogle.com/pink-tromboneReferences: https://sites.google.com/view/vowel-sounds-physics/homeSUBSCRIBE so you don’t miss a video! ►► http://bit.ly/iotbs_sub0:00 Your voice is just physics1:16 Some basics of linguistics2:27 There are more than 5 vowels?4:49 The physics of the vocal tract7:04 Resonance and sound filters8:47 How vowels are an acoustic illusion11:25 Finding vowels in surprising places13:09 A touching moment13:45 The extra bits-----------High fives to all our Brain Trust Patrons:Jaap WesteraMillennial GlacierMark LittlehaleMehdi DamouBarbora BeiBurt Humburgdani bowmanDavid JohnstonSalih ArslanBaerbel WinklerRobert YoungEric MeerDustinKaren HaskellJoin us on Patreon!https://patreon.com/itsokaytobesmartTwitterhttp://www.twitter.com/DrJoeHansonhttp://www.twitter.com/okaytobesmartInstagramhttp://www.instagram.com/DrJoeHansonhttp://www.instagram.com/okaytobesmartMerchhttps://store.dftba.com/collections/its-okay-to-be-smartFacebookhttps://www.facebook.com/itsokaytobesmartpbs/
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18 min - Why Getting Dizzy is Kinda Like Temporary Brain Damage
PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateOKAY
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Uploaded 26-04-19
You can check out Google's Science Journal app at http://g.co/ScienceJournal
We’ve all gotten dizzy before… but have you ever gotten WEIRD DIZZY? I teamed up with Vanessa Hill from BrainCrat to answer the question “why do we get dizzy?” and in the process we learned about some very strange and hilarious ways to get extra-special dizzy! Get ready to learn about your vestibular system, the system that lets you know where your body is in space. You don’t even notice your vestibular system is there… until it stops working right! #dizzy #neuroscience #vestibular
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REFERENCES:
Blakley, B. W., and Siegel, M. (1995). Feeling dizzy: Understanding and treating dizziness, vertigo, and other balance disorders. New York: Macmillan.
Brandt, T. (2003). Vertigo: Its multisensory syndromes (2nd ed.). London: Springer.
Ekdale, E. G. (2016). Form and function of the mammalian inner ear. Journal of Anatomy, 228(2), 324-337.
Hayes, S. H., Dinga, D. Slavia, R. J., and Allman, B. (2013). Chapter 1 - Anatomy and physiology of the external, middle and inner ear. In Handbook of Clinical Neurophysiology (pp. 3-23).
Plishka, C. M. (2015). A clinician’s guide to balance and dizziness: Evaluation and treatment. Thorofare, New Jersey: SLACK Incorporated.
Steward O. (2000) The Vestibular System. In Functional Neuroscience. Springer, New York, NY.
Welgampola, M. S., Bradshaw, A., and Halmagyi, G. M. (2011). Practical neurology part 4: Dizziness on head movement. Medical Journal of Australia, 195 (9): 518-522. doi: 10.5694/mja11.11001
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13 min - What Do Raindrops Really Look Like?
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Uploaded 25-09-18
What do raindrops look like? Exactly how we drew them as kids, right? Wrong! Teardrop-shaped rain is physically impossible. This week I went inside a vertical wind tunnel to bring you the true shape of rain.
Special thanks to iFly Indoor Skydiving in Austin, TX! Learn more about their STEM field trips: https://www.iflyworld.com/programs/stem-field-trips/
REFERENCES:
Dr. Scot Martin, Laboratory of Environmental Chemistry at Harvard University https://www.seas.harvard.edu/directory/smartin
Terminal Velocity of Raindrops Aloft
https://journals.ametsoc.org/doi/10.1175/1520-0450%281969%29008%3C0249%3ATVORA%3E2.0.CO%3B2
The Terminal Velocity of Fall for Water Droplets in Stagnant Air
https://journals.ametsoc.org/doi/pdf/10.1175/1520-0469%281949%29006%3C0243%3ATTVOFF%3E2.0.CO%3B2
Single-Drop Fragmentation Determines Size Distribution of Raindrops
https://www.nature.com/articles/nphys1340
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It’s Okay To Be Smart is hosted by Joe Hanson, Ph.D.
Director: Joe Nicolosi
Writer: Sarah Keartes
Creative Director: David Schulte
Editor/animator: Derek Borsheim
Producers: Stephanie Noone and Amanda Fox
Produced by PBS Digital Studios
Music via APM
Stock images from Shutterstock http://www.shutterstock.com
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10 min - You Are A Topsy-Turvy LobsterPBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateOKAY↓ More info and sources below ↓Subscribe to It's Okay To Be Smart: http://bit.ly/iotbs_subHere's why you aren't built like a lobster.Our bodies are mirror images of lobsters and other arthropods from back to belly. We've know since the early 19th century that our guts and nervous systems are inverted from theirs, but only recently has molecular biology shown us why. Here's the evolutionary tale about a worm doing the backstroke and why your guts are on your front.This is part 2 of 3 in my series about how our bodies evolved to look like they do. Check out the others:Part 1 - https://www.youtube.com/watch?v=qdNE4WygyAkPart 3 - Coming Friday!More info:Dorsoventral inversion: http://en.wikipedia.org/wiki/Inversion_(evolutionary_biology)Geoffrey Saint-Hilaire: http://en.wikipedia.org/wiki/%C3%89tienne_Geoffroy_Saint-HilaireCommon animal body plan between protostomes and deuterostomes: http://www.hhmi.ucla.edu/derobertis/EDR_MS/Evo-Devo_page/EVO-DEVO.htmlHow we know that our body plan came later: http://scienceblogs.com/pharyngula/2006/01/12/hemichordate-evodevo/Step by step along the evolutionary tree:http://tolweb.org/Bilateria/2459http://en.wikipedia.org/wiki/Bilateriahttp://en.wikipedia.org/wiki/Deuterostomehttp://en.wikipedia.org/wiki/Protostomehttp://en.wikipedia.org/wiki/Urochordatahttp://en.wikipedia.org/wiki/Chordatehttp://en.wikipedia.org/wiki/Cephalochordatahttp://en.wikipedia.org/wiki/Craniatehttp://en.wikipedia.org/wiki/GnathostomataEvolutionary timeline of vertebrates: http://www.utexas.edu/news/2008/03/03/tree/Joe Hanson - Host and writerJoe Nicolosi - DirectorAmanda Fox - Producer, Spotzen IncKate Eads - Associate ProducerKatie Graham - Director of PhotographyAndrew Matthews - Editor and motion graphicsJohn Knudsen - GafferMusic:"Ouroboros" by Kevin MacLeodStock images via ShutterstockProduced by PBS Digital Studios: http://www.youtube.com/user/pbsdigitalstudios-----------Join us on Patreon!https://patreon.com/itsokaytobesmartTwitterhttp://www.twitter.com/DrJoeHansonhttp://www.twitter.com/okaytobesmartInstagramhttp://www.instagram.com/DrJoeHansonhttp://www.instagram.com/okaytobesmartMerchhttps://store.dftba.com/collections/its-okay-to-be-smartFacebookhttps://www.facebook.com/itsokaytobesmartpbs/
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6 min
About Be Smart.
From the publisher's feed
We give you deep answers to simple questions about science and the rest of the universe. And also dad jokes.
Be Smart is hosted by Joe Hanson, PhD. He's a molecular biologist and an award-winning science communicator and journalist