A ball of glass will bounce higher than a ball made of rubber.
73
Iron weighs more after it rusts.
16
Each day, up to 150 species of life become extinct.
-23
One barrel of petroleum holds 42 gallons.
20
The sun is 330,330 times larger than the earth.
75
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6