Yawns are more contagious among people with closer relationships.
163
The average sperm cell swims at 8 inches per hour.
76
When you take a step, you are using up to 200 muscles.
886
The average person's skin weighs twice as much as their brain.
131
The human brain has the capacity to store everything that you experience.
4k
The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
13
An average heart beats 100,000 times a day, pumping some 2,000 gallons of blood through its chambers. Over a 70-year life span, that adds up to more than 2.5 billion heartbeats.
73
Our Right Lungs takes more air than our left lung.
194