Sound doesn't travel in space.
255
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
It 'snows' metal on Venus.
13
An international team of astronomers has spotted the farthest known gravitational lens and, as Albert Einstein predicted, it is a galaxy that deflects and intensifies the light of a much further object.
9
The last time that the Sun was in its current position in space around the Milky Way, dinosaurs ruled the Earth.
10
If NASA sent birds into space they would soon die; they need gravity to swallow.
146