A ball of glass will bounce higher than a ball made of rubber.
73
A cesium atom in an atomic clock beats over nine billion times a second.
43
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
Indoor pollution is 10 times more toxic than outdoor pollution.
62
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
One third of the electricity produced on earth is used to power electric light bulbs!
75
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108