A 100-pound person on Earth would weigh 38 pounds on Mars.
102
The light hitting the earth right now is 30 thousand years old.
163
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
The Earth gets heavier each day by tons, as meteoric dust settles on it.
118
Astronauts get taller when they are in space.
224
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
Jupiter's magnetosphere is the largest single structure inside the Solar System. If you could see it with your eyes, it would appear larger than our full Moon.
8