Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
Fingernails grow fastest on the hand you favor.
44
Human thigh bones are stronger than concrete!
63
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
The male fetus is capable of attaining an erection during the last trimester.
75
In Japan, condoms are commonly sold 'door to door'!
54
Ernest Hemingway survived through anthrax, malaria, pneumonia, dysentery, skin cancer, hepatitis, anemia, diabetes, high blood pressure, two plane crashes, a ruptured kidney, a ruptured spleen, a ruptured liver, a crushed vertebra, a fractured skull, and more.
67
The average sperm cell swims at 8 inches per hour.
4