Gigantism and Dwarfism on Islands

Why do many animal species become either larger or smaller on islands over time? Ask the Expert

Mike Morwood, coleader of the team that discovered the hobbit, answers viewer questions.

Compare the Brains

How does the hobbit's brain measure up to those of a modern human, a chimp, and others? Who's Who in Human Evolution

Meet your increasingly distant cousins in this clickable illustration of the past seven million years.