The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
Humans are capable of running 40 mph according to a study by bio-mechanical expert Dr. Matthew Bundle. Today's fastest man, Usain Bolt, has a top speed of 28 mph.
35
Research has determined that most people are happiest at 7:26pm on a Saturday night.
70
The average person will go on a date at least 100 times before they finally marry.
33
There are about 255 babies born worldwide every minute.
46
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
You can't tickle yourself.
29