Science May 26 Watch NASA’s Phoenix Sends Intriguing Images From Mars NASA's Phoenix Mars lander touched down Sunday and began transmitting pictures from the northern arctic plains of Mars where scientists hope to find evidence of water and life-sustaining conditions. Mission co-leader Ray Arvidson explains.
Science Jun 22 Polar Research on Earth Assists with Mars Study As scientists continue to explore the poles as part of the International Polar Year, hoping to better understand the Earth's most extreme environments, some researchers are looking for answers even farther off -- toward the north pole of Mars. By PBS News Hour