When a massive power outage struck southern California in the 1990s, Los Angeles residents reportedly called 911 to express alarm about strange clouds hovering overhead; they were seeing the Milky Way for the first time.
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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
The last time that the Sun was in its current position in space around the Milky Way, dinosaurs ruled the Earth.
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Mars had an oxygen-rich atmosphere around 4 billion years ago
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There are 5 to 10 times more stars in the known Universe than there are grains of sand on all the world's beaches, but a single grain of sand has more atoms than there are stars in the known Universe.
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There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
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If NASA sent birds into space they would soon die; they need gravity to swallow.
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