Gunny
Gold Member
LOS ANGELES, California (AP) -- NASA's Phoenix spacecraft has discovered evidence of past water at its Martian landing site and spotted falling snow for the first time, scientists reported Monday.
Soil experiments revealed the presence of two minerals known to be formed in liquid water. Scientists identified the minerals as calcium carbonate, found in limestone and chalk, and sheet silicate.
But exactly how that happened remains a mystery.
Phoenix lander spots falling snow on Mars - CNN.com