Despite its current dry and cold state, evidence suggests ancient Mars had significant amounts of liquid water in the form of ...

More specifically, experts say Mars once had a warm, wet climate, and their belief is based on striking geological features ...

Visit ancient Mars—a surprisingly temperate planet where snow or rain falls from the sky, and rivers rush down valleys to ...

In some computer simulations, they added widespread rain or snow. For others ... Their goal was to determine whether ancient Mars may have had a more Earth-like climate, at least for a while.

More specifically, experts say Mars once had a warm, wet climate, and their belief is based on striking geological features on the now-barren world ... may have once had rain — and even snow.

Visit ancient Mars -- a surprisingly temperate planet where snow or rain falls from the sky, and rivers rush down valleys to feed hundreds of lakes. A new study from geologists at the University ...