The Sun and Moon appear to be the same size because the moon is 400 times smaller than the Sun, but 400 times closer to Earth.
13
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
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
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
MDIF, a New York based non-profit organisation, is planning to beam free Wi-Fi to the entire world from space.
18
If NASA sent birds into space they would soon die; they need gravity to swallow.
146