Recently discovered evidence of carbonates beneath the surface of Mars points to a warmer and wetter environment in that planet's past. The presence of liquid water could have fostered the emergence of life.
Europe's Galileo sat-nav system, a rival to America's GPS, took a step closer to becoming operational Tuesday with the launch of a fresh pair of satellites to join a dozen already in space.
India has successfully tested its first small space shuttle as part of its efforts to make low-cost reusable spacecraft.
A Southwest Research Institute-led team of scientists discovered two geologically young craters—one 16 million, the other between 75 and 420 million, years old—in the Moon's darkest regions.
Europe's Galileo sat-nav system, a rival to America's GPS, should move closer to operation with the launch Tuesday of a fresh pair of satellites to join a dozen already in space.