Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
The human body contains over a billion miles of DNA.
147
The focusing muscles of the eyes move around 100,000 times a day. To give your leg muscles the same workout, you would need to walk 80km (50 miles) every day.
21
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
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193
It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
217

