More than 20 million meteoroids enter Earth's atmosphere every day.
139
The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
Astronauts get taller when they are in space.
224
The sun is 330,330 times larger than the earth!
190
If you went out into space, you would explode before you suffocated because there's no air pressure.
149
The population of the Earth has more than doubled since 1950.
151
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194