Our intuitive understanding of time is very different from a physicist's understanding of time. How do we reconcile these views?

Stem cells from a fetus can live within the mother for decades — and help her heal.

It just takes one “yes.” Wharton professor Jonah Berger shares his three tips for getting what you want from others.

The evidence that pollution causes cancer is weak. Lifestyle factors, like smoking, obesity, and alcohol, matter far more.

In the early stages of the hot Big Bang, matter and antimatter were (almost) balanced. After a brief while, matter won out. Here's how.