Mars had an oxygen-rich atmosphere around 4 billion years ago
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There are more nerve cells in the human brain than there are stars in the Milky Way.
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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.
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Saturn's moon, Mimas, not only looks like the Death Star, it also has a Pac Man heat signature.
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A neutron star (what remains after a Super Nova) is so dense that a portion of it the size of a sugar cube would weigh as much as all of humanity, or more than all the cars in the United States.
5
NASA invented baby food as we know it today.
7
If you were to cry in space, the tears would form a bubble in your eye until it's so big it moves to another spot on your face.
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