SpaceUS must play nice with China to put astronauts on Mars If NASA wants to help humanity survive in the long term, it needs to send people to Mars – but how will the space agency afford the trip? 51¶¯Âþ
SpaceA brief history of space flight – in numbers Thirty-one astronauts have been to Mars and back, or put in enough hours in space, anyway – just one of the insights from the stats of space flight 51¶¯Âþ