You can't tickle yourself.
29
The first South Park episode was made with construction paper. It took 3 months to make.
49
An average heart beats 100,000 times a day, pumping some 2,000 gallons of blood through its chambers. Over a 70-year life span, that adds up to more than 2.5 billion heartbeats.
73
A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court.
140
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
The largest breed of rabbit is the Flemish Giant.
65
It's possible to train your cat to use the toilet as a litter box and even flush afterwards.
109
Water is actually naturally blue.
48