Indoor pollution is 10 times more toxic than outdoor pollution.
62
Sound travels about 4 times faster in water than in air.
408
Iron weighs more after it rusts.
16
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57
Liquid TIDE laundry detergent glows under a blacklight.
96
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89