After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
Human hair and fingernails continue to grow after death.
7
On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
161
The human body contains over a billion miles of DNA.
147
An average heart beats 100,000 times a day, pumping some 2,000 gallons of blood through its chambers. Over a 70-year life span, that adds up to more than 2.5 billion heartbeats.
73
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
198
Enamel is hardest substance in the human body.
61
Cats have a weak sense of taste. They have only 473 tastebuds, humans have 9,000.
307