Be Smart.

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 ↓ Dorothy went over one. LeVar Burton read to us under one. In a song, Kermit the Frog connected us to one. Even Mork's suspenders were made of them. Our culture, and our skies, are full of rainbows, but do you know how they form? Do we all see the same rai...

Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/PBSDSDonate How do we smell? Great! Thanks for asking! Subscribe to It's Okay To Be Smart: http://bit.ly/iotbs_sub ↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/DrJoeHanson Follow on Instagram: http://instagram.com/DrJoeHanson We walk through life led by our noses....

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 ↓ Why does music give us all the feels? Click here to SUBSCRIBE, it's FREE! -- http://bit.ly/iotbs_sub Why does music make us feel happy or sad? Or angry or romantic? How can simple sound waves cause so much emotion? I went from my comfy chair to the street...

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 ↓ I took a trip to one of Austin's famous moontowers so I could put the enormity of our solar system into perspective. With the help of a grapefruit, and a lot of walking, you'll get an idea of just how tiny everything is out there!! Do it yourself! Calcula...

Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/PBSDSDonate Check out Planet Earth II! https://youtu.be/c8aFcHFu8QM On BBC One in the UK this Sunday and coming to BBC America on 28th January 2017 Don’t be bird-brained. You should SUBSCRIBE! http://bit.ly/iotbs_sub ↓ More info and sources below ↓ Want to wear your love for science? We’v...

Special thanks to Vanessa from BrainCraft for help with this video! Check out her channel: https://www.youtube.com/braincraft ↓↓↓ More info and sources below ↓↓↓ Until the early 20th century, Tasmania was home to a very weird wolf-like creature. Except that it wasn’t a wolf. Even though it looked like a wolf. How did that happen? Here’s the science of convergent evolution! Want to see more of my i...

Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/PBSDSDonate Subscribe so we can hit 1 MILLION! http://bit.ly/iotbs_sub Get yourself an awesome I DID A SCIENCE shirt! http://dftba.com/besmart ↓ More info and sources below ↓ How far would ocean viruses stretch? http://www.virology.ws/2009/10/19/ten-cool-facts-about-viruses/ Follow Aaron...

Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/PBSDSDonate Head to BrainCraft for more doggy science! http://youtu.be/OBy3idLwwYM ↓ More info and sources below ↓ Do you ever talk to your dog? Do they ever talk back? Humans and dogs have a truly amazing relationship, developed along an evolutionary journey that goes back nearly 10,000...

SUBSCRIBE so you don’t miss a video! ►► http://bit.ly/iotbs_sub ↓↓↓ More info and sources below ↓↓↓ 2023 was a wild year with everything from scorching temperatures to massive wildfires. Even with more renewable energy than ever, 2023’s climate data still seems really bad. So how should we think about climate change today? And what can we do about it? Learn what climate scientists think about 2023...

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 ↓ Why do we build monuments? And what are they made of? Click here to SUBSCRIBE -- http://bit.ly/iotbs_sub I took a trip to Washington D.C. to check out some of our nation's most famous monuments. Where do they come from? From the depths of the Earth to the...

Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/PBSDSDonate I used #badDNA once in this video. Can you find it? Don’t miss our next video! SUBSCRIBE! ►► http://bit.ly/iotbs_sub ↓↓↓ More info and sources below ↓↓↓ If you see #badDna, be sure to show me on Twitter! @DrJoeHanson @okaytobesmart Biology textbooks are full of drawings of DNA...

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 ↓ Comic book heroes ain't got nothin' on evolution. Click here to SUBSCRIBE and get more great science, it's FREE! -- http://bit.ly/iotbs_sub Evolution has come up with some pretty amazing ways to get things done when it comes to animals, plants and microbe...

...and other Christmas mysteries answered with science! Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/PBSDSDonate Subscribe to It's Okay To Be Smart: http://bit.ly/iotbs_sub Happy Holidays! Ever wonder how Santa could possibly manage to deliver all those presents in a single night? Or what gives red-nosed reindeer the ability to fly?...

You've got questions, I've got answers! Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/PBSDSDonate Subscribe to It's Okay To Be Smart: http://bit.ly/iotbs_sub Big thank you to the 7th and 8th graders from Northwest Middle School in Salt Lake City, UT! Great questions! Have an idea for an episode or an amazing science question you want...

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 ↓ What does a ginkgo tree have in common with a dinosaur? SUBSCRIBE, it's FREE! http://bit.ly/iotbs_sub Every fall, in cities like New York, the smell of vomit fills the crisp air. The culprit? The pungent seeds of the ginkgo biloba tree. So why would a tre...

Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/PBSDSDonate Don't miss our next video! SUBSCRIBE! ►► http://bit.ly/iotbs_sub You can learn more about your personal DNA story by going to https://23andMe.com/okay ↓↓↓ More info and sources below ↓↓↓ Why do we love people we're related to? Compared to strangers, why do we feel such a deep...

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 ↓ My ode to space exploration and Discovery... Galileo would have made a great astronaut. Click here to SUBSCRIBE, it's FREE! -- http://bit.ly/iotbs_sub Why do we go to space? In the beginning of our space program, the answer had a lot to do with war and pa...

Get the FACTS about climate change: http://youtu.be/ffjIyms1BX4 Don’t miss our next video! SUBSCRIBE! ►► http://bit.ly/iotbs_sub ↓ More info and sources below ↓ Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/PBSDSDonate Scientists overwhelmingly agree that our climate is changing, Earth is getting warmer, sea levels are rising, and it...

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 ↓ How are we looking and listening for intelligent life? Don’t miss our next video! SUBSCRIBE! ►► http://bit.ly/iotbs_sub Now that we know planets are common in our galaxy, how would we tell if one holds life? Sure, it will take incredibly powerful telescop...

Learn more about CuriosityStream at https://curiositystream.com/smart Don’t miss our next video! SUBSCRIBE! ►► http://bit.ly/iotbs_sub ↓↓↓ More info and sources below ↓↓↓ The other day I got bored and noticed this weird thing happened when I held my finger up to my eye, so I had to science it and figure it out! Let me know if you try these light-bending experiments too, especially that last one th...

Try 23andMe: http://www.23andme.com/okay Make sure we don’t go extinct and SUBSCRIBE! ►► http://bit.ly/iotbs_sub ↓↓↓More info and sources below ↓↓↓ De-extinction, or using the power of modern biotechnology to bring back extinct species like mammoths and dinosaurs, would be cool. But is it really as easy as the movies make it look? Or do the cruel hands of time make it impossible? This weel we look...

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.↓↓↓ More info and sources below ↓↓↓Follow me to @pbsterra and watch Overview to celebrate Earth Month with PBS: https://youtu.be/ivoV1rwiYJkPBS Earth Month Playlist: https://www.youtube.com/playlist?list=PLnNZYWyBGJ1...

Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/PBSDSDonate Don’t be hard-headed. You should SUBSCRIBE! http://bit.ly/iotbs_sub Tweet this video ⇒ http://bit.ly/OKTBSbang Share on FB ⇒ http://bit.ly/OKTBSbangFB ↓ More info and sources below ↓ Translate this video: LINK TKTK Want to wear your love for science? We’ve got merch: http://df...