The focusing muscles of the eyes move around 100,000 times a day. To give your leg muscles the same workout, you would need to walk 80km (50 miles) every day.
21
Crying literally alleviates stress and uniquely allows humans to decrease feelings of anger and sadness.
24
According to a study conducted by the University of South Carolina, Marijuana can be used to reduce inflammation and treat autoimmune diseases such as arthritis, lupus, colitis, and multiple sclerosis.
25
The human brain doesn't stop developing until about 25 years old.
102
In one day, adult lungs move about 10,000 litres of air.
11
Flu shots only work about 70% of the time.
18
The smallest human penis ever recorded was just 5/8 of an inch long!
77
The human brain is insensitive to pain.
76