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↓ More info and sources below ↓
Ever wonder how the heart symbol came to stand for the actual heart? And why do we speak of the heart as the seat of love, when love really happens in our brains? Is it true that animals only get a billion heartbeats? This week, we give you enough cool cardiac science to make your heart skip a beat
Origin of the heart symbol: http://www.slate.com/articles/news_and_politics/explainer/2006/02/the_shape_of_my_heart.html
History of silphium trade: http://www.jstor.org/discover/10.2307/4256173?sid=21105598276993&uid=3739256&uid=3739920&uid=4&uid=2
What causes the pain of heartbreak?
http://www.scientificamerican.com/article/what-causes-chest-pains/
The heartbeat hypothesis:
http://en.wikipedia.org/wiki/Heartbeat_hypothesis
The quarter power scaling principle:
http://www.npr.org/templates/story/story.php?storyId=12877984
http://hep.ucsb.edu/courses/ph6b_99/0111299sci-scaling.html
http://www.sjsu.edu/faculty/watkins/longevity.htm
Have an idea for an episode or an amazing science question you want answered? Leave a comment below!
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It's Okay To Be Smart is written and hosted by Joe Hanson, Ph.DFollow 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 for PBS Digital Studios
Joe Hanson - Creator/Host/Writer
Joe Nicolosi - Director
Amanda Fox - Producer, Spotzen IncKate Eads - Associate Producer
Andrew Matthews - Editing/Motion Graphics
Katie Graham - Director of Photography
John Knudsen - Gaffer
Dalton Allen - Post-Production Intern
Theme music:
"Ouroboros" by Kevin MacLeod
Other music via APM
Stock images from Shutterstock
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Last week's video:
What is Déjà Vu? https://www.youtube.com/watch?v=ut8mYGi0YRs
More videos:
Why Are Some People Left-Handed? https://www.youtube.com/watch?v=NPvMUpcxPSA
Why Did We Blow on NES Games? https://www.youtube.com/watch?v=4Gf9mtXnJfM
The Science of Game of Thrones - https://www.youtube.com/watch?v=Utu-LpJn3Is
There Was No First Human - https://www.youtube.com/watch?v=xdWLhXi24Mo
How The Elements Got Their Names - https://www.youtube.com/watch?v=mtg9p6A6xnY
