Why Are Some People Left-Handed?
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[MUSIC] [MUSIC] Evolution spent nearly 400 million years crafting these works of art, two of the most important pieces of the human evolutionary puzzle. Yet 99% of us end up being good with one hand and not the other, for common tasks like writing, high-fiving, and the all-important one-handed texting. Even life itself seems to have chosen sides: our amino acids are said to be “left-handed”, our DNA turns in a right-handed helix. Both hands seem fully capable, both are connected to fully functional arms, so we’d expect an even split when it comes to which hand we prefer. In the animal kingdom, where we find creatures with a preference for one paw, hoof, or wing, it’s usually 50/50. Yet on average, only 1 out of 10 humans are southpaws. I guess the ...
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[MUSIC] [MUSIC] Evolution spent nearly 400 million years crafting these works of art, two of the most important pieces of the human evolutionary puzzle. Yet 99% of us end up being good with one hand and not the other, for common tasks like writing, high-fiving, and the all-important one-handed texting. Even life itself seems to have chosen sides: our amino acids are said to be “left-handed”, our DNA turns in a right-handed helix. Both hands seem fully capable, both are connected to fully functional arms, so we’d expect an even split when it comes to which hand we prefer. In the animal kingdom, where we find creatures with a preference for one paw, hoof, or wing, it’s usually 50/50. Yet on average, only 1 out of 10 humans are southpaws. I guess the ...
