Be Smart.

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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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Please email [email protected]


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

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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

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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

Produced by PBS Digital Studios
Music via APM
Stock images from Shutterstock http://www.shutterstock.com

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Uploaded 08-12-20

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Here we are, just a year after the first news of the coronavirus we now call SARS-CoV-2 and the global pandemic known as COVID-19… and scientists have already developed more than one safe and effective vaccine. How did they do that so quickly? I visited the lab whose work directly led to these first COVID vaccines, so you can learn how basic research connects to life-saving medicine. This is how to make a COVID-19 vaccine.

Coronavirus animation courtesy of: Janet Iwasa, University of Utah, with funding from the NSF, the Coronavirus Structural Task Force and the German Federal Ministery of Research

References:
Wrapp, D. et al. Cryo-EM structure of the 2019-nCoV spike in the prefusion conformation. Science 367, 1260–1263 (2020) doi: 10.1126/science.abb2507

Watanabe, Y., Allen, J. D., Wrapp, D., McLellan, J. S. and Crispin, M. Site-specific glycan analysis of the SARS-CoV-2 spike. Science eabb9983 (2020) doi:10.1126/science.abb9983.

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You can learn more at https://curiositystream.com/smart
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Uploaded 05-03-19

You may have heard that a kilogram of feathers weighs the same as a kilogram of steel, but that all depends on where you weigh them. This video is all about the difference between mass and weight, and how weirdly awesome Earth’s gravity really is.

REFERENCES:
https://en.wikipedia.org/wiki/Mass_versus_weight
http://curious.astro.cornell.edu/about-us/42-our-solar-system/the-earth/gravity/94-does-your-weight-change-between-the-poles-and-the-equator-intermediate
https://en.wikipedia.org/wiki/Equatorial_bulge
http://www.cleonis.nl/physics/phys256/equatorial_bulge.php
https://en.wikipedia.org/wiki/Geoid
https://gracefo.jpl.nasa.gov/
http://www2.csr.utexas.edu/grace/publications/fact_sheet/4.html

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It’s Okay To Be Smart is hosted by Joe Hanson, Ph.D.
Director: Joe Nicolosi
Researcher: Matt Caplan, Ph.D.
Creative Director: David Schulte
Editors/animators: Derek Borsheim
Executive Producer: Amanda Fox
Producer: Stephanie Noone

Produced by PBS Digital Studios
Music via APM
Stock images from Shutterstock http://www.shutterstock.com

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