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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Earth is the only planet in our solar system that's not named after a god or goddess.
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Mars had an oxygen-rich atmosphere around 4 billion years ago
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NASA invented baby food as we know it today.
7
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
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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.
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