Our eyes are always the same size from birth, but our nose and ears never stop growing.
269
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
Your heart will pump about 212 million liters in its lifetime.
26
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
If you are cold you are more likely to be hungry because you use energy to keep warm.
144
One human hair can support 3 ounces.
191
The brain receives 20% of the body’s oxygen and 25% of total body glucose utilization, despite it accounting for only 2% of a person’s weight (about 1.4 kilograms).
8