Mars had an oxygen-rich atmosphere around 4 billion years ago
13
If NASA sent birds into space they would soon die; they need gravity to swallow.
146
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
From the nitrogen in our DNA, to the calcium in our teeth, the iron in our blood, to the carbon in our apple pies - all were made in the interiors of collapsing stars; we're all made of stardust.
22
Jupiter is bigger than all the other planets combined.
254
NASA invented baby food as we know it today.
7