An implantable scaffold and magnetic probes capture circulating tumor cells directly in the bloodstream, eliminating over 90% of captured cells in rabbits and goats.

Both events were tragic, but they didn’t ­involve people I was directly connected to. When I was young, my friends and contemporaries were, like me, essentially immortal. Right? Wrong. In the past ...

A rare Homo habilis skeleton from Kenya reveals how early humans moved, climbed, and adapted more than two million years ago.