An astonishing gift
"One small step"
Not everyone supports spending the money to send humans to Mars
Will your grandchildren live on Mars?
NASA's Dr. Rick Gilbrech explains
Bob Simon gets a chance to play with the robonaut
This robot operates itself
Finding out what it would be like
NASA's Steve Squyres weighs in
Up to 18 months on Mars
Back to the moon
Al Gore is donating profits from his book and Oscar-winning documentary "An Inconvenient Truth" to help fund an ad campaign on global warming.
The space shuttle 'Endeavour' has returned to earth after a record-breaking mission to the International Space Station.
The Space Shuttle 'Endeavour' has landed at Kennedy Space Center after a record-breaking mission to the International Space Station.
Archaeologists have unearthed what they believe to be western Europe's oldest human remains.
Science fiction author Arthur C. Clarke has died, aged 90.
Science fiction writer and space expert Arthur C. Clarke has died at the age of 90 in Sri Lanka.
The space shuttle Endeavour is on its way to the International Space Station but it is no routine flight.