Jezero Crater on Mars was once home to a lake, delta and rivers. See an animation of what it could have looked like when water poured into the crater billions of years ago and present day. Credit: ...

Imagine walking through a quiet forest and hearing the distant trickle of water suddenly interrupted by a sharp slap—like a ...

On a wave-battered rock in the northern Pacific Ocean, a fish called the sculpin grips the surface firmly to maintain ...