More than a dozen men have stood on the surface of the moon, but only three have been to Challenger Deep in the Marianas Trench, the deepest known spot in the ocean.
17
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119
In 1859, the largest known geomagnetic storm struck the Caribbean, causing an aurora and telegraphs could even operate without a power source.
25
According to a 2011 poll, 32% of Russians believe that the Sun orbits Earth.
11
Earth is the only planet in our solar system that's not named after a god or goddess.
17
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
A single speck of dust is half way in size between a subatomic particle and the Earth.
15