An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
If aliens located 60-65 million light years away from us, looked at earth through a really powerful telescope today, they would see dinosaurs!
18
Astronomer Percival Lowell believed that he was the first person to observe canals on Venus, but because of a faulty adjustment of the eyepiece on his telescope, he was in fact looking at the blood vessels in his own eye.
4
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
There are more nerve cells in the human brain than there are stars in the Milky Way.
349