It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
The human brain has the capacity to store everything that you experience.
4k
Women have about four times as many foot problems as men; lifelong patterns of wearing high heels often are the culprit.
111
Playing Tetris after a traumatic event can prevent the development of traumatic memories and reduce the chance of having flashbacks.
30
Your heart will pump about 212 million liters in its lifetime.
26
Tigers can see 6 times better at night than humans.
305
On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
160
Human hair and fingernails continue to grow after death.
7