Is the Red Planet White or Blue? Geologists battle over water and CO2.
By Dawn Stover
Posted 05.08.2002 at 3:26 pm 0 Comments
For years, scientists thought that Mars was a cold, dry planet. But pictures sent back by the Mars Global Surveyor over the past three years have rocked that long-held view. Now, many scientists think that the planet may in fact have once been a warm, wet world-what University of Arizona geologist Victor Baker calls a Blue Mars. The Surveyor images show fissures, gullies, valley networks, and layered rocks that resemble sedimentary deposits-features normally formed by water.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.