One of the biggest existential questions an individual can ask is "What makes me, me?" Identical twins have near-identical genetics, yet can still develop quite different personalities – about as perfect a demonstration as nature could offer that DNA isn't destiny.

One of the biggest existential questions an individual can ask is "What makes me, me?" Identical twins have near-identical genetics, yet can still develop quite different…

A new study probes genetic variants linked to the big five personality traits