Why are we (almost all) right-handed? Two million years of evolutionary mystery
No hay una sola causa, sino varias de ellas, entrelazadas. La hipótesis con más fuerza apunta al desarrollo de nuestro cerebro y al origen del lenguaje: los gestos
There's a number that neuroscientists have been looking at with fascination and perplexity for decades: 90. It's the percentage of humans who, in any culture, era studied and corner of the planet, preferentially use their right hand. That 90% is a figure so stable, so universal, so round and so strange that the question isn't even why left-handers exist. It's why there are so few of them, and in such a consistent way, in time and in space.
Translated by urgent.news. Machine-written — may contain errors; check the original before relying on it.
