Landing on Mars is difficult and not always successful. Well-designed advance testing helps. An ambitious NASA Mars rover mission set to launch in 2020 will rely on a special parachute to slow the spacecraft down as it enters ...
Nov 15, 2017 in Space Exploration
Groundwater recharge in the Western U.S. will change as the climate warms—the dry southern regions will have less and the northern regions will have more, a University of Arizona-led research team reports.
Nov 16, 2017 in Earth Sciences