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 ...

Rip currents are silent killers. These fast-moving channels of water can reach a speed of 1 to 2 feet per second, but they have been measured as high as 8 feet per second!