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
One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
277
The population of the Earth has more than doubled since 1950.
151
The sun puts out more power in 1 second than mankind has ever used within human existence.
14
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
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
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9