Exploration advocates are pushing back against the planned cancellation of NASA's Mars sample return project, saying it could ...

"We're going to do it in three years, and we're going to do it for a ridiculously low price." ...

Using gravitational microlensing, scientists have discovered a rare, large planet at the edge of the Milky Way. The planet is only the third to be found on the outskirts of our galaxy's dense central ...