You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
17
It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
217
The idea of left brain (logical) and right brain (creative) has no basis in neuroscience and is in fact a myth.
16
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
A person can live without food for about a month, but only about a week without water.
156
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
198
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