The world's shortest man measures only 21.5 inches.
73
In one day, adult lungs move about 10,000 litres of air.
11
A human brain produces as many as 12,000 to 50,000 thoughts per day, depending on how deep a thinker a person is.
23
Modern humans first appeared about 200,000 years ago, but record keeping didn't begin until about 6,000 years ago. That means about 97% of human history is lost.
21
Enamel is hardest substance in the human body.
61
The human brain has the capacity to store everything that you experience.
4k
You can't tickle yourself.
29