A person can live without food for about a month, but only about a week without water.
156
Obsessive nose picking is called Rhinotillexomania.
101
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Enamel is hardest substance in the human body.
61
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
The human body contains over a billion miles of DNA.
147
Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
15
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99