It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.
130
We share 70% of our DNA with a slug.
218
The human eye blinks an average of 4,200,000 times a year.
233
A third of the human population sneezes when they look at the Sun. Light can signal the ocular nerve near the sinuses and triggers a sneeze.
18
Women have about four times as many foot problems as men; lifelong patterns of wearing high heels often are the culprit.
111
Cats have a weak sense of taste. They have only 473 tastebuds, humans have 9,000.
307
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89