A ball of glass will bounce higher than a ball made of rubber.
73
Indoor pollution is 10 times more toxic than outdoor pollution.
62
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
The left ear is more responsive to words of love and emotion whispered into it than the right.
40
Aluminum used to be more valuable than gold!
84
Sound travels about 4 times faster in water than in air.
408
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
One barrel of petroleum holds 42 gallons.
20