The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
One cubic foot of gold weighs more than 1,200 pounds!
78
The bark of an older redwood tree is fireproof.
65
In 1999, Harvard physicist Lene Hau was able to slow down light to 17 meters per second and in 2001, was able to stop light completely.
39
In the 1950s, the US government placed beer next to an atomic bomb blast to determine if it was still drinkable. The result: in the event of a nuclear war, beer is safe to drink!
16
Scientists aren't sure what color dinosaurs were.
312
Diamonds can be shattered with a hammer.
-104
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71