One out of 20 people have an extra rib.
66
The average person's skin weighs twice as much as their brain.
131
During a typical human life span, the human heart will beat approximately 2.5 billion times.
21
The right lung takes in more air than the left.
30
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
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
It is almost impossible to sneeze with your eyes open. It is a defense mechanism that has evolved to protect our eyes from bacteria and debris.
164
You can alleviate a tickly throat by scratching your ear.
9