When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
A person can live without food for about a month, but only about a week without water.
156
Your heart will pump about 212 million liters in its lifetime.
26
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
It takes about 20 seconds for a red blood cell to circle the whole body.
102
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
One human hair can support 3 ounces.
191