It takes about 20 seconds for a red blood cell to circle the whole body.
102
Babies crawl an average of 200m a day.
212
Women have about four times as many foot problems as men; lifelong patterns of wearing high heels often are the culprit.
111
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
In one day, adult lungs move about 10,000 litres of air.
11
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23