When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
Your spit has a painkiller 6 times stronger than morphine. It contains a substance called opiorphin that is stronger than morphine.
39
About half of all Americans are on a diet on any given day.
29
35,000 people in the U.S. will die from the flu annually.
6
When your face blushes, the lining of your stomach turns red, too.
154
The brain receives 20% of the body’s oxygen and 25% of total body glucose utilization, despite it accounting for only 2% of a person’s weight (about 1.4 kilograms).
8
Common pesticides such as roach, termite, and flea insecticide can be found in the bodies of the majority of Americans.
11
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