Your heart will pump about 212 million liters in its lifetime.
26
Flu shots only work about 70% of the time.
18
The male fetus is capable of attaining an erection during the last trimester.
75
The human brain doesn't stop developing until about 25 years old.
102
The first patented condom was meant to be reused!
47
Your spit has a painkiller 6 times stronger than morphine. It contains a substance called opiorphin that is stronger than morphine.
39
Your stomach produces a new layer of mucus every two weeks so that it doesn't digest itself.
160