How did X come to symbolize "The UNKNOWN"?

Ask Joe Topics #4

You have questions, I have answers! Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/PBSDSDonate SUBSCRIBE, it's FREE! http://bit.ly/iotbs_sub ↓ More below ↓ In this edition of Ask Joe Stuff, you'll find out what the date really is according to Earth's age, why we get chills up our spine, what my favorite planet is, why hair grows (or doesn't), and why root beer is so foamy. Yummy science! Check out my buddy Veritasium's videos on the wave/particle nature of light: https://www.youtube.com/watch?v=cztocbHiiqQ and https://www.youtube.com/watch?v=Iuv6hY6zsd0 Check out the Ask Joe Playlist: https://www.youtube.com/playlist?list=PLsmqeqKj7M-r5ktD9-RAaUYWxWFjPV1w- Joe Hanson - Host and writer Joe Nicolosi - Director Amanda Fox - Producer, Spotzen IncKate Eads - Associate Producer Katie Graham - Director of Photography Stephanie Noone - Editor John Knudsen - Gaffer Produced by PBS Digital Studios: http://www.youtube.com/user/pbsdigitalstudios ----------- Join us on Patreon! https://patreon.com/itsokaytobesmart Twitter http://www.twitter.com/DrJoeHanson http://www.twitter.com/okaytobesmart Instagram http://www.instagram.com/DrJoeHanson http://www.instagram.com/okaytobesmart Merch https://store.dftba.com/collections/its-okay-to-be-smart Facebook https://www.facebook.com/itsokaytobesmartpbs/ Learn more about your ad choices. Visit megaphone.fm/adchoices [https://megaphone.fm/adchoices]

Inside the Lab That Protects You From Your Car

Crashing a car is usually not a good idea. But sometimes, it can save lives. ↓↓↓ More info and sources below ↓↓↓ No one ever wants to get in a car crash. But if you ever do, be very thankful for the engineers who crash test cars. You may have seen crash test simulations on TikTok using physics engines like BeamNG but I promise you they are nothing compared to the real thing! Join us for this DEEP dive into the physics of car crashes and the ways that engineers hack Newton's laws to keep you safe. Filmed on location at the Insurance Institute for Highway Safety https://www.iihs.org/ IIHS on YouTube: https://www.youtube.com/@iihs-hldi IIHS resources for teachers: https://classroom.iihs.org/ Crash test sensor car by PocketLab: https://www.thepocketlab.com/ References: https://sites.google.com/view/be-smart-crash-test-physics/home Join our Patreon community: https://www.patreon.com/itsokaytobesmart SUBSCRIBE so you don’t miss a video! ►► http://bit.ly/iotbs_sub 0:00 Intro - Deep dive into crash testing 1:37 Welcome to crash test HQ 2:25 She crashes cars for a living 3:42 A visit with Isaac Newton 5:41 Why Newton's 2nd law rules all 11:21 New problems, new crash tests 14:37 Very finely-tuned violence 17:58 How engineers prepare a crash test (lots of duct tape) 20:42 Who you callin' dummy, dummy? 25:02 Car go BOOM (and the aftermath) 31:00 In the future, will cars be smart enough not to crash? 36:24 Conclusion and extras ----------- High fives to all our Brain Trust Patrons: Charles Horton, Jr Holly, Brett, and Ashe Bullion Jaap Westera Millennial Glacier Mehdi Damou Barbora Bei Burt Humburg dani bowman David Johnston Baerbel Winkler Robert Young Eric Meer Karen Haskell Join us on Patreon! https://patreon.com/itsokaytobesmart Twitter http://www.twitter.com/DrJoeHanson http://www.twitter.com/okaytobesmart Instagram http://www.instagram.com/DrJoeHanson http://www.instagram.com/okaytobesmart Merch https://store.dftba.com/collections/its-okay-to-be-smart Facebook https://www.facebook.com/itsokaytobesmartpbs/ Learn more about your ad choices. Visit megaphone.fm/adchoices [https://megaphone.fm/adchoices]

Why Sports Fans' Brains are Formed Different (with @smartereveryday)

Take the PBS Digital Studios Audience Survey: https://to.pbs.org/pbssurvey2023a ↓↓↓ More info and sources below ↓↓↓ Humans can develop intense relationships, even obsessions, with the things we’re fans of. A huge part of our identities, our emotions, and our lives get tied up in these things. Why are we like this? Join our Patreon community: https://www.patreon.com/itsokaytobesmart SUBSCRIBE so you don’t miss a video! ►► http://bit.ly/iotbs_sub ----------- High fives to all our Brain Trust Patrons: Charles Horton, Jr Holly, Brett, and Ashe Bullion Jaap Westera Millennial Glacier Mehdi Damou Barbora Bei Burt Humburg dani bowman David Johnston Baerbel Winkler Robert Young Eric Meer Karen Haskell Join us on Patreon! https://patreon.com/itsokaytobesmart Twitter http://www.twitter.com/DrJoeHanson http://www.twitter.com/okaytobesmart Instagram http://www.instagram.com/DrJoeHanson http://www.instagram.com/okaytobesmart Merch https://store.dftba.com/collections/its-okay-to-be-smart Facebook https://www.facebook.com/itsokaytobesmartpbs/ Learn more about your ad choices. Visit megaphone.fm/adchoices [https://megaphone.fm/adchoices]

How did X come to symbolize "The UNKNOWN"?

A truly X-cellent and X-ceptional video… Join our Patreon community: https://www.patreon.com/itsokaytobesmart ↓↓↓ More info and sources below ↓↓↓ Despite being one of the rarest letters in English, the letter X is everywhere. We sign letters with it, we rate movies with it, we name all sorts of things after it. We’re kind of obsessed with it. And that’s probably all thanks to math, where X stands for the unknown. Let's explore the bizarre history of how X took on this role… References: https://sites.google.com/view/why-are-we-so-obsessed-with-x/home SUBSCRIBE so you don’t miss a video! ►► http://bit.ly/iotbs_sub ----------- High fives to all our Brain Trust Patrons: Charles Horton, Jr Holly, Brett, and Ashe Bullion Jaap Westera Millennial Glacier Mehdi Damou Barbora Bei Burt Humburg dani bowman David Johnston Baerbel Winkler Robert Young Eric Meer Karen Haskell Join us on Patreon! https://patreon.com/itsokaytobesmart Twitter http://www.twitter.com/DrJoeHanson http://www.twitter.com/okaytobesmart Instagram http://www.instagram.com/DrJoeHanson http://www.instagram.com/okaytobesmart Merch https://store.dftba.com/collections/its-okay-to-be-smart Facebook https://www.facebook.com/itsokaytobesmartpbs/ Learn more about your ad choices. Visit megaphone.fm/adchoices [https://megaphone.fm/adchoices]

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, Jr Holly, Brett, and Ashe Bullion Jaap Westera Millennial Glacier Mehdi Damou Barbora Bei Burt Humburg dani bowman David Johnston Baerbel Winkler Robert Young Eric Meer Karen Haskell Join us on Patreon! https://patreon.com/itsokaytobesmart Twitter http://www.twitter.com/DrJoeHanson http://www.twitter.com/okaytobesmart Instagram http://www.instagram.com/DrJoeHanson http://www.instagram.com/okaytobesmart Learn more about your ad choices. Visit megaphone.fm/adchoices [https://megaphone.fm/adchoices]