Yawns are more contagious among people with closer relationships.
163
A human being loses an average of 40 to 100 strands of hair a day.
133
Research has determined that most people are happiest at 7:26pm on a Saturday night.
69
The average sperm cell swims at 8 inches per hour.
4
It takes approximately 12 hours for food to entirely digest.
93
It takes about 20 seconds for a red blood cell to circle the whole body.
102
A third of the human population sneezes when they look at the Sun. Light can signal the ocular nerve near the sinuses and triggers a sneeze.
18
We share 70% of our DNA with a slug.
218