After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
In one day, adult lungs move about 10,000 litres of air.
11
Mushrooms are more closely related to humans than they are to plants.
47
A human being loses an average of 40 to 100 strands of hair a day.
133
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14