The human brain uses approximately as much energy as a 10 watt light bulb.
120
It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
217
The levels of two stress hormones, cortisol and epinephrine which suppress the body's immune system, will actually drop after a dose of laughter.
112
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
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
Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
32
The human sigh acts as a physiological reset button.
23