All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
Pluto is smaller than Russia.
9
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
A lightning bolt generates temperatures five times hotter than those found at the sun's surface!
127
Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160
The Earth gets 100 tons heavier every day due to falling space dust.
673
The typical spec of dust that you see floating in the air is half way in size between the Earth and a subatomic particle.
131