Neil Armstrong, the first man to step foot on the moon, carried with him a piece of cloth and wood from the original 1903 Wright Flyer.
12
There are 5 to 10 times more stars in the known Universe than there are grains of sand on all the world's beaches, but a single grain of sand has more atoms than there are stars in the known Universe.
20
The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
An international team of astronomers has spotted the farthest known gravitational lens and, as Albert Einstein predicted, it is a galaxy that deflects and intensifies the light of a much further object.
9
If two pieces of metal touch in space, they become permanently stuck together.
808
More than 20 million meteoroids enter Earth's atmosphere every day.
139
Lightning strikes about 6,000 times per minute on this planet!
158