Buzz Aldrin, the American astronaut who was the second man to walk on the Moon, said Wednesday that the United States must lead the way toward building a permanent settlement on Mars.

Space & Earth - Space Exploration

May 08, 2013 4.6 / 5 (19) 31

Setting foot on Mars by the 2030s is human destiny and a US priority, and every dollar available must be spent on bridging gaps in knowledge on how to get there, NASA's chief said Monday.

Space & Earth - Space Exploration

May 06, 2013 4.3 / 5 (9) 15