An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
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A comet's tail always points away from the sun.
2
According to a study by the National Science Foundation, only half of Americans believe in evolution, and one in 4 don't know that the Earth orbits the Sun.
14
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.
20
NASA invented baby food as we know it today.
7
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
It 'snows' metal on Venus.
13