More than 20 million meteoroids enter Earth's atmosphere every day.
139
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
It would take more than 150 years to drive a car to the sun.
569
The last time that the Sun was in its current position in space around the Milky Way, dinosaurs ruled the Earth.
10
Pluto is smaller than Russia.
9
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147