Mars had an oxygen-rich atmosphere around 4 billion years ago
13
Sound doesn't travel in space.
255
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
NASA invented baby food as we know it today.
7
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
277