The skin on your lips is 200 times more sensitive than your fingertips.
345
Men have larger hearts; women's hearts beat faster.
77
The average person can live for eleven days without water, assuming an average temperature of 60 degrees fahrenheit.
15
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
Banging your head against a wall uses 150 calories an hour.
57
Your heart rate can rise as much as 30% during a yawn.
69
The average person who stops smoking requires one hour less sleep a night.
79
Your thumb is about the same size as your nose.
124