SpaceMartian tubes could be home for 'cavenauts' Lava tubes on Mars may contain water ice, simulations show, providing protection from radiation and a water source for astronauts 51¶¯Âþ
SpaceCould moon rocket demise bring space shuttle reprieve? Opponents of the plan to retire the space shuttle later this year have been emboldened by the cancellation of NASA's Constellation programme 51¶¯Âþ