The world's shortest man measures only 21.5 inches.
73
Tigers can see 6 times better at night than humans.
305
Cats have a weak sense of taste. They have only 473 tastebuds, humans have 9,000.
307
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Playing Tetris after a traumatic event can prevent the development of traumatic memories and reduce the chance of having flashbacks.
29
Only humans shed emotional tears.
331
You can't tickle yourself.
29
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127