By Tony Ford,2015-04-08 16:16
The U.S. space agency NASA has ambitious plans for exploring Mars with the
robotic rover called Curiosity, scheduled to land on the red planet in August. But
NASA's long-range plan to send a human crew there by 2030 is under fire from
critics, who include some former NASA astronauts and managers. The critics doubt
such a mission will ever come about an..