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
A third of the human population sneezes when they look at the Sun. Light can signal the ocular nerve near the sinuses and triggers a sneeze.
18
It takes approximately 12 hours for food to entirely digest.
93
The human brain is more active during sleep than during the day.
28
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
Gorillas can catch human colds and other illnesses.
205
The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
13
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14