You can't tickle yourself.
29
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
161
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191
Our Right Lungs takes more air than our left lung.
194
In one day, adult lungs move about 10,000 litres of air.
11
On average, there's 100 billion neurons in the human brain.
83