Is every living thing on Earth related?

We're distantly related, you and I. Somewhere deep in the past, the two of us share a common ancestor. The same can be said for us and chimps. Or chimps and alligators. But what about alligators and sycamore trees? Or humans and Tyrannosaurus rex? Are you and I, as paleontology expert Brian Switek puts it, distant… » 11/30/12 12:28pm 11/30/12 12:28pm

How database searches solved a 50-year-old medical mystery

Calcium is everywhere in your body, not just your bones and teeth. In fact, this mineral is crucial to countless biological processes, from regulating your hormones to aiding muscle function. And when you don't have enough of it, the results can be disastrous. » 6/24/11 8:00am 6/24/11 8:00am