Creepy yet interesting SCIENCE!

UberFacts

For a while scientists had a theory that left-handed people started out as twins while in utero. Their belief was that in a set of twins one is usually right-handed and the other left-handed. Genetic and nurturing factors can also affect handedness, but they can’t explain it completely in many cases. Maybe all lefties were the result of only one twin surviving the cage fight that is fetal development.

It wasn’t until ultrasounds, and fearless cameras capable of surviving the uterus, that scientists discovered their hunch was right. Sort of. They were right in the fact that most lefties were once twins but they didn’t go far enough. Scientists now think that a ridiculous one in eight people started out as two peas in a pod. Of course, only about one in 70 people actually is a twin. So what happened to your twin? You killed it and then absorbed it…

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