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Why Are Some People Left-Handed?

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 Biology   |   Health   |   Psychology   |   Science
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The science of their sinister ways…
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↓ More info and sources below ↓
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We've got two perfectly good hands attached to two perfectly good arms, so why do most people prefer to use one over the other for common tasks?

David Wolman’s “A Left Hand Turn Around the World” http://amzn.to/1wYqOS2
(lots more references in there!)

Chris McManus’ “Right Hand, Left Hand” http://amzn.to/1umztyL

The best collection of the science of handedness on the internet: Right, Left, Right, Wrong - http://www.rightleftrightwrong.com/index.html

Genetic link between handedness and body asymmetry: http://www.plosgenetics.org/article/info:doi/10.1371/journal.pgen.1003751

A gene associated with handedness and schizophrenia: http://www.nature.com/mp/journal/v12/n12/abs/4002053a.html

Genetic theories of handedness: http://www.rightleftrightwrong.com/theories_genetic.html

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Have an idea for an episode or an amazing science question you want answered? Leave a comment below!

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Produced by PBS Digital Studios: http://www.youtube.com/user/pbsdigitalstudios

Joe Hanson - Host and writer
Joe Nicolosi - Director
Amanda Fox - Producer, Spotzen Inc.
Kate Eads - Associate Producer
Katie Graham - Director of Photography
Andrew Matthews - Editing/Motion Graphics
Dalton Allen - Post-production intern
John Knudsen - Gaffer

Theme music:
“Ouroboros” by Kevin MacLeod

Stock images via Shutterstock

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Last week’s video:
Ebola - The Full Story https://www.youtube.com/watch?v=B44JfptNuG0


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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
The Far Future of the Universe - https://www.youtube.com/watch?v=Jl9DwNOonOA
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

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