Chances are, you've already picked a side—but is it the best choice? Let's compare Apple and Google's mobile operating ...

The B-2 Spirit was a major breakthrough in US Air Force airpower, enabling the service to project power through almost any defended airspace.

Elephants use about 1,000 specialized trunk whiskers with a built-in stiffness gradient to precisely sense contact.

Elephants use about 1,000 specialized trunk whiskers with a built-in stiffness gradient to precisely sense contact.

An elephant can lift a log, swing sand onto its back, and still pick up a peanut without crushing it. That mix of strength ...