A person will create enough saliva to fill two average size swimming pools during his lifetime.
191
You can't tickle yourself.
29
Our Right Lungs takes more air than our left lung.
194
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
15
The human brain is more active during sleep than during the day.
28
Every human spent about half an hour as a single cell.
144
The world's shortest man measures only 21.5 inches.
73