The energy used by the brain is enough to light a 25 watt bulb.

A 10-minute loss of oxygen can cause significant neural damage. Cold can lengthen this time, which is why cold-water drowning victims have been revived after as much as 40 minutes – without brain damage.

13 muscles are used to smile, but 47 are required for frowning. You have to smile nearly a quarter of a million times to make 1 wrinkle.

In most advertisements, including newspapers, the time displayed on a watch is 10:10. See if you can spot it next time!

There are 52 bones in your feet, which is about 25% of all the bones in your body.

Do you know what tapetum is?