Your fingernails grow faster in summer.
744
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
Babies crawl an average of 200m a day.
212
There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
62
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
In one day, adult lungs move about 10,000 litres of air.
11
The human eye blinks an average of 4,200,000 times a year.
233
On average, there's 100 billion neurons in the human brain.
83