The human brain uses approximately as much energy as a 10 watt light bulb.
120
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
According to one report, it would take 800 marijuana joints to kill a person - but the cause of death would be carbon monoxide poisoning.
176
We blink 25 times a minute.
51
Perspiration is odorless; it is the bacteria on the skin that creates an odor.
39
If you stop working out, it takes twice as long to lose strength than it took to gain it.
16
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
The average human body contains enough iron to make a small nail.
50