Every hour one billion cells in the body must be replaced.
17
The human brain is insensitive to pain.
76
A person infected with the SARS virus, has a 95-98% chance of recovery.
23
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 1996, research found that having excessive body hair is linked to higher intelligence.
23