How An Igloo Protects You From Cold

The Equinox Isn't What You Suppose It Is

Is the equinox really when day = night? Don’t miss our next video! SUBSCRIBE! ►► http://bit.ly/iotbs_sub ↓↓↓ More info and sources below ↓↓↓ Calculate day length where you live for any date: http://www.timeanddate.com/sun/ Very cool solar angle simulator: http://astro.unl.edu/classaction/animations/coordsmotion/eclipticsimulator.html Have an idea for an episode or an amazing science question you want answered? Leave a comment or check us out at the links below! Follow on Twitter: http://twitter.com/okaytobesmart http://twitter.com/DrJoeHanson Follow on Tumblr: http://www.itsokaytobesmart.com Follow on Instagram: http://instagram.com/DrJoeHanson ----------------- It’s Okay To Be Smart is written and hosted by Joe Hanson, Ph.D. Music via APM Stock images from Shutterstock, stock footage from Videoblocks (unless otherwise noted) Learn more about your ad choices. Visit megaphone.fm/adchoices [https://megaphone.fm/adchoices]

Einstein Is (Basically) Always Right: Gravitational Waves Edition

Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/PBSDSDonate Try Squarespace: http://squarespace.com/itsokaytobesmart Tweet this ⇒ http://bit.ly/OKTBSgr Share on FB ⇒ http://bit.ly/OKTBSgrFB ↓ More info and sources below ↓ Check out this PBS Space Time playlist all about general and special relativity: https://www.youtube.com/playlist?list=PLsPUh22kYmNAmjsHke4pd8S9z6m_hVRur Physics Girl explains gravitational waves: https://www.youtube.com/watch?v=HrduBZ319XI LIGO’s gravitational waves converted into sound (from the end of video): https://www.youtube.com/watch?v=TWqhUANNFXw Have an idea for an episode or an amazing science question you want answered? Leave a comment or check us out at the links below! Follow on Twitter: http://twitter.com/okaytobesmart http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobesmart.com Follow on Instagram: http://instagram.com/jtotheizzoe Follow on Snapchat: YoDrJoe ----------------- It’s Okay To Be Smart is written and hosted by Joe Hanson, Ph.D. Follow me on Twitter: @jtotheizzoe Email me: itsokaytobesmart AT gmail DOT com Facebook: http://www.facebook.com/itsokaytobesmart For more awesome science, check out: http://www.itsokaytobesmart.com Produced by PBS Digital Studios: http://www.youtube.com/user/pbsdigita... Music via APM Stock images from Shutterstock, stock footage from Videoblocks (unless otherwise noted) Learn more about your ad choices. Visit megaphone.fm/adchoices [https://megaphone.fm/adchoices]

Why Going to Mars Would Completely Suck

Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/PBSDSDonate Watch more at http://pbs.org/yearinspace Tweet this ⇒ http://bit.ly/OKTBSyis Share on FB ⇒ http://bit.ly/OKTBSyisFB ↓ More info and sources below ↓ Dig deeper: National Research Council. “Space Radiation Hazards and the Vision for Space Exploration: Report of a Workshop.” Washington, DC: The National Academies Press, 2006. doi:10.17226/11760. NASA Facts “Understanding Space Radiation” http://spaceflight.nasa.gov/spacenews... Cucinotta, Francis A., and Marco Durante. "Cancer risk from exposure to galactic cosmic rays: implications for space exploration by human beings."The lancet oncology 7.5 (2006): 431-435. Crucian, Brian, et al. "Alterations in adaptive immunity persist during long-duration spaceflight." npj Microgravity 1 (2015). Durante, Marco, K. George, and F. A. Cucinotta. "Chromosomes lacking telomeres are present in the progeny of human lymphocytes exposed to heavy ions." Radiation research 165.1 (2006): 51-58. Smith, Scott M., et al. "Benefits for bone from resistance exercise and nutrition in long‐duration spaceflight: evidence from biochemistry and densitometry." Journal of Bone and Mineral Research 27.9 (2012): 1896-1906. Reddit AMA with Dr. Susan Bailey - telomere twin study research leader: https://www.reddit.com/r/IAmA/comment... Space Station Live - interview with Dr. Susan Bailey https://www.youtube.com/watch?v=VnNUM... Space Station Live - science of the gut https://www.youtube.com/watch?v=uFhvJ... Currently funded crew health research proposals: http://www.nasa.gov/content/nasa-and-... Footage courtesy of NASA and PBS unless otherwise noted Have an idea for an episode or an amazing science question you want answered? Leave a comment or check us out at the links below! Follow on Twitter: http://twitter.com/okaytobesmart http://twitter.com/drjoehanson Follow on Tumblr: http://www.itsokaytobesmart.com Follow on Instagram: http://instagram.com/drjoehanson ----------------- It’s Okay To Be Smart is written and hosted by Joe Hanson, Ph.D. Follow me on Twitter: @jtotheizzoe Email me: itsokaytobesmart AT gmail DOT com Facebook: http://www.facebook.com/itsokaytobesmart For more awesome science, check out: http://www.itsokaytobesmart.com Produced by PBS Digital Studios: http://www.youtube.com/user/pbsdigita... Music via APM Stock images from Shutterstock, stock footage from Videoblocks (unless otherwise noted) Learn more about your ad choices. Visit megaphone.fm/adchoices [https://megaphone.fm/adchoices]

How Do Squirrels Recover Their Nuts?

Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/PBSDSDonate ↓ More info and sources below ↓ Try Squarespace: http://squarespace.com/itsokaytobesmart You’d have to be nuts not to love this video! Special thanks to Jason Goldman (@jgold85) for help with this episode! References: Jacobs, Lucia F., and Emily R. Liman. "Grey squirrels remember the locations of buried nuts." Animal Behaviour 41.1 (1991): 103-110. Delgado, Mikel M., et al. "Fox squirrels match food assessment and cache effort to value and scarcity." PloS one 9.3 (2014): e92892. Raby, Caroline R., et al. "Planning for the future by western scrub-jays."Nature 445.7130 (2007): 919-921. Dally, Joanna M., Nathan J. Emery, and Nicola S. Clayton. "Food-caching western scrub-jays keep track of who was watching when." Science312.5780 (2006): 1662-1665. Clayton, Nicola S., Joanna M. Dally, and Nathan J. Emery. "Social cognition by food-caching corvids. The western scrub-jay as a natural psychologist."Philosophical Transactions of the Royal Society of London B: Biological Sciences 362.1480 (2007): 507-522. Have an idea for an episode or an amazing science question you want answered? Leave a comment or check us out at the links below! Follow on Twitter: http://twitter.com/okaytobesmart http://twitter.com/DrJoeHanson Follow on Tumblr: http://www.itsokaytobesmart.com Follow on Instagram: http://instagram.com/DrJoeHanson ----------------- It’s Okay To Be Smart is written and hosted by Joe Hanson, Ph.D. Follow me on Twitter: @jtotheizzoe Email me: itsokaytobesmart AT gmail DOT com Facebook: http://www.facebook.com/itsokaytobesmart For more awesome science, check out: http://www.itsokaytobesmart.com Produced by PBS Digital Studios: http://www.youtube.com/user/pbsdigita... Music via APM Stock images from Shutterstock, stock footage from Videoblocks (unless otherwise noted) Learn more about your ad choices. Visit megaphone.fm/adchoices [https://megaphone.fm/adchoices]

Is Big Data Getting Out of Hand?

Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/PBSDSDonate Try Lynda.com: http://lynda.com/okay Best experienced in 240p or lower ↓ More info and sources below ↓ Check out Stanford’s “Raw Data” podcast: https://soundcloud.com/rawdatapodcast https://itunes.apple.com/us/podcast/r... Most numbers in the video are from this book: Big Data: A Revolution That Will Transform How We Live, Work, and Think - Viktor Mayer-Schönberger and Kenneth Cukier http://amzn.to/1Vhc3Ei Sources: DNA Storage: http://cen.acs.org/articles/93/i35/Sc... Square kilometer array (and other data scales): http://highscalability.com/blog/2012/... How much data does ___ store? http://techexpectations.org/2015/03/2... Have an idea for an episode or an amazing science question you want answered? Leave a comment or check us out at the links below! Follow on Twitter: http://twitter.com/okaytobesmart http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobesmart.com Follow on Instagram: http://instagram.com/jtotheizzoe Follow on Snapchat: YoDrJoe ----------------- It’s Okay To Be Smart is written and hosted by Joe Hanson, Ph.D. Follow me on Twitter: @jtotheizzoe Email me: itsokaytobesmart AT gmail DOT com Facebook: http://www.facebook.com/itsokaytobesmart For more awesome science, check out: http://www.itsokaytobesmart.com Produced by PBS Digital Studios: http://www.youtube.com/user/pbsdigita... Music via APM Stock images from Shutterstock, stock footage from Videoblocks (unless otherwise noted) Learn more about your ad choices. Visit megaphone.fm/adchoices [https://megaphone.fm/adchoices]