Mars had an oxygen-rich atmosphere around 4 billion years ago
13
The ashes of the man who discovered Pluto are currently en route to dwarf planet, scheduled to arrive on the 14th of July, 2015.
11
If two pieces of metal touch in space, they become permanently stuck together.
808
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
One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
277
There are more nerve cells in the human brain than there are stars in the Milky Way.
349