Be Smart.

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Uploaded 01-04-21

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The finest burritos in the world are made in San Francisco’s Mission District. But how can you get a hot and fresh one in New York City in time for lunch? Physics, that’s how. For this very serious and scientific video, we dug a classic documentary out of the vault that tells the story of the transcontinental burrito tunnel, and its successor, the transcontinental burrito hypertunnel. They are both true marvels of physics. Oh, and they aren’t real… but the science is.

References: https://sites.google.com/view/burrito-tunnel-references/home

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So… baby teeth are pretty terrifying, huh?
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Uploaded 09-10-18

Teeth. We’ve all got ‘em (most of us, anyway). But how do they grow? Teeth are made from some biological nanotechnology that will blow your mind. They are strong enough to last hundreds of millions of years. Oh, and if you’ve ever wondered how adult teeth replace your baby teeth, get ready to see something terrifying.

Special thanks to Matthew Brown, Ph.D. and the University of Texas Vertebrate Paleontology Collection

Watch the tasty new series “Tacos of Texas” https://www.youtube.com/channel/UCdzQ_ilHPH3rQtgzo4nKM_g

REFERENCES:

Dr. Gareth J. Fraser, Department of Biology, University of Florida
Dr. Andrew Gillis, Department of Zoology, University of Cambridge

S.J. AlQahtani Et al. (2010) Brief Communication: The London Atlas of Human Tooth Development and Eruption. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 142:481–490

Teruel Jde D Et al. (2015) Comparison of chemical composition of enamel and dentine in human, bovine, porcine and bovine teeth. Archives of Oral Biology Volume 60, Issue 5 768-775

Hill, M.A. (2018) Embryology Timeline human development. https://embryology.med.unsw.edu.au/embryology/index.php/Timeline_human_development



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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: Mark Rodriguez
Producers: Stephanie Noone and Amanda Fox

Produced by PBS Digital Studios
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Uploaded 29-09-19

Thanks to IBM Z for supporting PBS. To learn more about the annual student contest, go to https://ibm.co/2nVdMtD . To learn more about IBM Z go to https://ibm.co/2nVagPR

Check out or friends from Two Cents for more great videos about money and finance! https://www.youtube.com/channel/UCL8w_A8p8P1HWI3k6PR5Z6w

Money. We all use it. But is it real? I mean, you can touch a coin or bill, but who decided that’s worth anything? And what about all those 1’s and 0’s getting swapped and traded by computers thousands of times per second? How are those worth anything? We trace the history of money, from physical barter to bitcoin, and discover that money isn’t just a lie we all agree to share, it’s been built on the back of technology and invention for millennia.

References: https://sites.google.com/view/invention-of-money-references/home

Special thanks to our Brain Trust Patrons:
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Thank you to Squarespace for supporting PBS. Go to https://www.squarespace.com/besmart for a free trial and use code BESMART to save 10% off your first purchase of a website or domain.
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Uploaded 31-03-26

Follow me to Deep Look and celebrate Earth Month with PBS: https://www.youtube.com/watch?v=fbuJSmpxiNY
PBS Earth Month Playlist: https://www.youtube.com/playlist?list=PLnNZYWyBGJ1F8ofFm4H9UTrHxqU8zngK4

DNA evidence is supposed to be the gold standard of criminal investigation. But what happens when that same technology sends innocent people to prison? Featuring interviews with Amanda Knox and forensic DNA expert Dr. Greg Hampikian, this is my investigation of DNA forensics, and what happens when we trust the science but don't ask the right questions.

References: https://sites.google.com/view/besmart-forensic-dna/home

0:00 "I'm being framed."
1:28 DNA is supposed to be magic
2:40 The serial killer who never existed
7:02 How forensic DNA actually works
11:41 His DNA was at the crime scene. He wasn't.
14:37 What happened to Amanda Knox
20:02 The DNA never lied. Or did it?

Be Smart explores science questions you didn’t even know you wondered about. It is hosted and produced by Joe Hanson, PhD. We post new videos all the time, so please subscribe! If you enjoyed this video, hit the ‘like’ button, leave a comment, or watch another of our videos!

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A big thanks to our Brain Trust patrons: Baerbel Winkler, Brent Lopez, dani bowman, David Johnston, Ed Eyden, Eric Meer, Greg Olson, Holly, Brett, and Ashe Bullion, Jaap Westera, Karen Haskell, Marcus Pingel, Mike and Patty Loftis, Paul Weir, Reuben Brewer

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Stock video and images provided by Shutterstock, Artlist, and MotionArray
Music provided by APM
Written by Molly Edwards and Joe Hanson
Edited by Ben Harrison
Produced by Least Square Media and Spotzen for PBS Digital Studios



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“In Our Nature” is a NEW special limited series on It’s Okay To Be Smart!
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Uploaded 01-09-21

Seemingly distant ecosystems, even half a world apart, are connected in surprising ways. In this special limited series, Emily Graslie and Trace Dominguez join me as we explore the universal rules of life that tie together Earth’s living systems. In episode 5, we meet some interesting bugs that use truly extreme senses to navigate their world. How do dung beetles use astronomy to roll their poo balls home? And what does a swarm of beetles descending on a packed football stadium have to do with forest fires? Welcome to the world of extreme animal senses.

References: https://sites.google.com/view/inournature5-references/home

In Our Nature is a special miniseries produced by It’s Okay To Be Smart for PBS. Stay tuned for more episodes coming this summer, here on our YouTube channel!

Original Production Funding provided by: Anne Ray Foundation, a Margaret A. Cargill Philanthropy

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Uploaded 03-03-20

Thank you for The Great Courses Plus for supporting PBS. To learn more click http://ow.ly/3fCw30qmlF1
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If the sun instantly switched off like a light bulb–which can’t happen, by the way–then we wouldn’t know for almost 8 and a half minutes. Light travels at the fastest speed there is, but it still takes almost 500 seconds to get to Earth. That’s how long it would take before we knew the sun went dark. But the most amazing thing about the sunlight we see is it’s actually really old. SUPER old. AMAZINGLY OLD! Tens of thousands of years old. How is that possible? Because of the physics and mathematics of random walks.

References: https://sites.google.com/view/how-old-is-sunlight-references/home

Special thanks to our Brain Trust Patrons:
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Uploaded 19-09-17

You're gonna lobe this video
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Are you a left-brained person or a right-brained person? Spoiler: You're neither. Each of us uses both sides of our brain for most of what we do. But still, there are a number of brain functions that do show lateralization, where they are localized to one side or another. Why is this? And how does it influence our definition of consciousness? People with "split brains" can help us figure it out.

Special thanks to Dr. Michael Gazzaniga for his help researching this video!
Here's a wonderful vintage film featuring Dr. Gazzaniga's early split brain work: https://archive.org/details/splitbrain

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READ MORE:

Gazzaniga, Michael S. "Forty-five years of split-brain research and still going strong." Nature reviews. Neuroscience 6.8 (2005): 653.
http://bit.ly/2ymOh55

Gazzaniga, Michael S. "The split-brain: Rooting consciousness in biology." Proceedings of the National Academy of Sciences 111.51 (2014): 18093-18094.
http://bit.ly/2yoacZo

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It's Okay To Be Smart is hosted by Joe Hanson, Ph.D.
Director: Joe Nicolosi
Writer: Shaena Montanari, Ph.D.
Editor/animator: Andrew Orsak
Producer: Stephanie Noone and Amanda Fox

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