There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
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Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
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On Titan, Saturn's largest moon, the atmosphere is so thick and the gravity so low that humans could fly through it by flapping "wings" attached to their arms.
7
Scientists have confirmed that Enceladus, one of Saturn’s moons, has a watery ocean.
6
There are more nerve cells in the human brain than there are stars in the Milky Way.
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