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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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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”
(lots more references in there!)

Chris McManus’ “Right Hand, Left Hand”

The best collection of the science of handedness on the internet: Right, Left, Right, Wrong -

Genetic link between handedness and body asymmetry:

A gene associated with handedness and schizophrenia:

Genetic theories of handedness:


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:

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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