The human brain uses approximately as much energy as a 10 watt light bulb.
120
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Human hair and fingernails continue to grow after death.
7
Our brains have a negativity bias and will remember bad memories more than good ones.
15
It takes approximately 12 hours for food to entirely digest.
93
Tigers can see 6 times better at night than humans.
305
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
A person can live without food for about a month, but only about a week without water.
156