http://www.msnbc.msn.com/id/27827606/

updated 3:49 p.m. ET Nov. 25, 2008

Mars has vast glaciers hidden under aprons of rocky debris near mid-latitude mountains, a new study confirms, pointing to a new and large potential reservoir of life-supporting water on the planet.

"Just one of the features we examined is three times larger than the city of Los Angeles and up to one-half-mile thick, and there are many more."

Glaciers are huge reservoirs of water once they melt, key to all life as we know it.