Stolen people - mostly women and children - were a driving force in the evolution of modern society. By Catherine M. Cameron

How we burn calories helps explain why exercise does little to control weight and how we developed distinctive traits. By Herman Pontzer.

Doctors are dealing with evidence that chronic use of popular heartburn medicines may be riskier than was thought. By Karen Weintraub.

A fossil record of the dinosaurs that led to birds, reveals how evolution produces new kinds of organisms. By Stephen Brusatte.

Your E-mail Password Will Never Be Safe! A long list of corporate and political hacks has made that very clear. By David Pogue.

Wild monkeys make stone "tools" that bear a striking resemblance to artifacts produced by early humans. By Kate Wong.

Scientists copy nature's most complex organ in the hope of solving the mysteries of brain disorders .... By Juergen A. Knoblich.

Ten Ideas That Will Change the World. Advances with the potential to solve problems and improve life for all of us. Ideas 1 through 5.

Don't worry about defiant machines. Devious human masters and misunderstood commands are a bigger threat. By G. Briggs and M. Scheutz.

Scientists are taking steps toward growing organs for people inside pigs, cows and other animals. By Juan Carlos Izpisua Belmonte.