For U.S. women's national team head coach Emma Hayes, the task ahead of her in Saturday's SheBelieves Cup finale against Colombia was an obvious one. "Listen, we have to play our game. I'm interested ...

The meaning of “performance” has changed dramatically. It once meant raw power and stripped-down simplicity. A fast car was loud, stiff, and often uncomfortable. That world is gone. Today, performance ...

Even Charles Darwin was puzzled by the evolution of the vertebrate eye. New research suggests that it traces back to a cyclopean invertebrate with a single eye atop the head. By Carl Zimmer Look at ...