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17:31

Is Earth's Most Important Ocean Current Doomed?

Be Smart. ·

2026/10/05

PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateOKAY ↓ More info and sources below ↓ Head over to Animal IQ on Terra: https://youtu.be/Nc3mUNkJZZk Celebrate Earth Day with other PBS Channels! https://bit.ly/32nmIsp We’re on PATREON! Join the community ►► https://www.patreon.com/itsokaytobesmart SUBSCRIBE so you don’t miss a video! ►► http://bit.ly/iotbs_sub Ocean currents are our planet’s circulatory system, and they keep everything from

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28:22

The Mystery of Earth's Disappearing Giants | IN OUR...

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2026/10/05

“In Our Nature” is a NEW special limited series on It’s Okay To Be Smart!We’re on PATREON! Join the community ►► https://www.patreon.com/itsokaytobesmart↓↓↓ More info and sources below ↓↓↓Uploaded 16-09-21Seemingly 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 6, we investigate a mystery. Millennia

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19:20

Scientists Finally Figured Out What Love Is For

Be Smart. ·

2026/10/04

The dumb things we do for love make a lot more sense than you think…↓↓↓ More info and sources below ↓↓↓Love makes people do ridiculous things: quit jobs, cross continents, build monuments, and ignore every red flag in sight. But what if that's exactly what love evolved to do? This video explores the neuroscience, psychology, and evolutionary biology of romance to explain why love can feel irrational—and why that may have helped make us human.References:

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23:01

Why Dung Beetles Stare At the Stars | IN OUR NATURE

Be Smart. ·

2026/10/04

“In Our Nature” is a NEW special limited series on It’s Okay To Be Smart!We’re on PATREON! Join the community ►► https://www.patreon.com/itsokaytobesmart↓↓↓ More info and sources below ↓↓↓Uploaded 01-09-21Seemingly 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

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28:20

These Butt-Tickling Ants Are Endangered Butterfly...

Be Smart. ·

2026/10/03

Check out "Out of Our Elements" on PBS Terra! https://youtu.be/tp-FsXHVFoU“In Our Nature” is a NEW special limited series on It’s Okay To Be Smart!We’re on PATREON! Join the community ►► https://www.patreon.com/itsokaytobesmart↓↓↓ More info and sources below ↓↓↓Uploaded 18-08-21Seemingly 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

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37:16

These Death-Eating Scavengers Are Real Life-Savers |...

Be Smart. ·

2026/10/02

Thank you to Blinkist for supporting PBS. For more information and trial go to http://www.blinkist.com/OkayToBeSmart. “In Our Nature” is a NEW special limited series on It’s Okay To Be Smart! We’re on PATREON! Join the community ►► https://www.patreon.com/itsokaytobesmart ↓↓↓ More info and sources below ↓↓↓ 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

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32:40

The Surprising Species That Everything Else Depends...

Be Smart. ·

2026/10/01

“In Our Nature” is a NEW special limited series on It’s Okay To Be Smart! SUBSCRIBE so you don’t miss the next episode! ►► http://bit.ly/iotbs_sub ↓↓↓ More info and sources below ↓↓↓ 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 1, we travel from Africa’s Serengeti plains to the nearly

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18:24

A Brief (Scientific) History of Butts

Be Smart. ·

2026/09/30

Thank you to Morning Brew for supporting PBS. To learn more, head over to https://bit.ly/mbokaytobesmart We're on PATREON! Join the community ►► https://www.patreon.com/itsokaytobesmart ↓↓↓ More info and sources below ↓↓↓ Hold on to your butts. This episode is about… butts. The science and evolutionary history of your rear end, the down-low on your derriere, shining a little light where the sun don't shine… you get the picture. But(t) seriously, we don't talk about this all-important hole enough,

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25:40

How Your Brain Makes Its Own Electricity

Be Smart. ·

2026/09/29

We’re on PATREON! Join the community ►► https://www.patreon.com/itsokaytobesmart Follow me to Animal IQ: https://youtu.be/yPrQ3Pl-iEM ↓↓↓ More info and sources below ↓↓↓ Here’s a thought: What IS a thought? I know it involves my brain, and my brain is made of neurons. And my brain’s neurons are listening to other neurons all over my body. But how do those neurons actually work? Maybe you’ve heard that it involves electricity, but does that mean you’ve got little zaps and lightning bolts running

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16:03

The Transcontinental Burrito Hypertunnel (is it...

Be Smart. ·

2026/09/27

PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateOKAY ↓ More info and sources below ↓ We’re on PATREON! Join the community ►► https://www.patreon.com/itsokaytobesmart SUBSCRIBE so you don’t miss a video! ►► http://bit.ly/iotbs_sub The finest burritos in the world are made in San Francisco’s Mission District. But how can you get a hot & fresh one in New York City in time for lunch? Physics, that’s how. For this very serious and scientific

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25:59

What is Impossible in Evolution?

Be Smart. ·

2026/09/26

PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateOKAY ↓ More info and sources below ↓ We’re on PATREON! Join the community ►► https://www.patreon.com/itsokaytobesmart SUBSCRIBE so you don’t miss a video! ►► http://bit.ly/iotbs_sub Could humans ever evolve to have wings? Why don’t fish have propellers? Why don’t tigers have wheels? Why don’t zebras have laser turrets? These might all seem like stupid questions (and maybe they are!) but they

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29:39

The Golden Ratio: Is It Myth or Math?

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2026/09/25

PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateOKAY ↓ More info and sources below ↓ We’re on PATREON! Join the community ►► https://www.patreon.com/itsokaytobesmart SUBSCRIBE so you don’t miss a video! ►► http://bit.ly/iotbs_sub ↓↓↓ More info and sources below ↓↓↓ The golden ratio. Some say it’s the most mythical number in the universe. Others say it underlies everything from nature’s patterns to beauty in art and design. But, like, what

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27:45

When Is Now?

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2026/09/24

PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateOKAY ↓ More info and sources below ↓ We’re on PATREON! Join the community ►► https://www.patreon.com/itsokaytobesmart SUBSCRIBE so you don’t miss a video! ►► http://bit.ly/iotbs_sub When is now? Seems like a pretty simple question… just look at your watch. But do you and I share the same “now”? Let’s journey from Einstein’s thought experiments about relativity to cutting edge neuroscience

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20:21

Using a Bunch of Mousetraps to Explain How Pandemics...

Be Smart. ·

2026/09/23

PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateOKAY ↓ More info and sources below ↓ More vaccine info here: https://www.cdc.gov/vaccines/vac-gen/default.htm Special thanks to @theslowmoguys ! https://www.youtube.com/user/theslowmoguys Thanks to Gates Notes for Supporting PBS. Since the start of the coronavirus COVID-19 pandemic, the term “herd immunity” has been all over the news. But what does it really mean? One thing most people

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23:01

Why Do We Lie?

Be Smart. ·

2026/09/22

PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateOKAY ↓ More info and sources below ↓ We’re on PATREON! Join the community ►► https://www.patreon.com/itsokaytobesmart SUBSCRIBE so you don’t miss a video! ►► http://bit.ly/iotbs_sub Everyone lies. Even you and even me. We lie about small things and we lie about big things. We lie to help ourselves and we lie to protect others. Powerful people lie, all the way down to little kids telling

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10:14

Glass is Solid… So Why Is It Clear?

Be Smart. ·

2026/09/21

Thank you to CuriosityStream for supporting PBS! For more information, go to https://curiositystream.com/smart and USE code SMART. ↓↓↓ More info and sources below ↓↓↓ PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateOKAY Follow me to Overview on PBS Terra! https://www.youtube.com/watch?v=hjez0W8SPXc Glass is made of sand, which is a kind of rock. But glass is transparent, and rocks aren’t transparent. What’s up with that? Why is glass

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15:35

Inside the Lab That Invented the COVID-19 Vaccine

Be Smart. ·

2026/09/20

PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateOKAY ↓ More info and sources below ↓ We’re on PATREON! Join the community ►► https://www.patreon.com/itsokaytobesmart SUBSCRIBE so you don’t miss a video! ►► http://bit.ly/iotbs_sub 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 & effective vaccine. How

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13:10

The TRUE Story of Ben Franklin & His Kite

Be Smart. ·

2026/09/19

PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateOKAY ↓ More info and sources below ↓ Thank you to Target for supporting PBS. You can learn more at: https://target.com/community Share your story today: https://to.pbs.org/3izZeXh You’ve probably heard of Ben Franklin and the kite. But do you know the TRUE story of how his famous experiment changed the world? Here’s the tale of how one person’s quest for scientific knowledge altered the

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20:48

Why Are There 7 Days In a Week? EXPLAINED

Be Smart. ·

2026/09/18

PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateOKAY ↓ More info and sources below ↓ We’re on PATREON! Join the community ►► https://www.patreon.com/itsokaytobesmart SUBSCRIBE so you don’t miss a video! ►► http://bit.ly/iotbs_sub Why does everyone use a 7 day week, and where did it come from? Where do the names of the days come from? And who can we blame for Mondays? Here’s the true story of one of the oldest human customs still in use

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11:39

Why Geckos Are Sticky Without Being Sticky

Be Smart. ·

2026/09/17

The sticky physics that let geckos do what they do! We’re on PATREON! Join the community ►► https://www.patreon.com/itsokaytobesmart ↓ More info and sources below ↓ Geckos can grip and climb almost anything. Walking up walls, hanging upside down… even from glass. It’s almost like they can defy gravity. How do they do it? The secret lies in nanotechnology. I’ll tell you how that works and how scientists are using this incredible gripping ability to inspire next-generation adhesives. Here's the

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