A person can live without food for about a month, but only about a week without water.
156
Tigers can see 6 times better at night than humans.
305
There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
62
You forget 90% of your dreams.
256
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Gorillas can catch human colds and other illnesses.
205
A human brain produces as many as 12,000 to 50,000 thoughts per day, depending on how deep a thinker a person is.
23
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11