It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
One human hair can support 3 ounces.
191
A human being loses an average of 40 to 100 strands of hair a day.
133
We forget why we have entered a room because passing through doors creates an ‘event boundary’ causing the brain to file away what we were just thinking about.
26
Gorillas can catch human colds and other illnesses.
205
Our Right Lungs takes more air than our left lung.
194
In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.
130