When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
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
Men have larger hearts; women's hearts beat faster.
77
A person will burn 7 percent more calories if they walk on hard dirt compared to pavement.
45
Redheads require up to 20% more anesthesia to be knocked out.
112
In the average lifetime a person will breath in about 44 pounds of dust.
21