At birth, a panda is smaller than a mouse and weighs about four ounces. See more

An adult human heart weighs about 10 ounces and beats over 100,000 times a day See more

22% of American women aged 20 gave birth while in their teens. In Switzerland and Japan, only 2% did so. See more

Men can read smaller print than women; women can hear better. See more

Don't give a dog chocolate! Chocolate affects a dog's heart and nervous system; a few ounces are enough to kill a small dog. See more

The typical laboratory mouse runs 2.5 miles per night on its treadmill. See more

Hot water weighs less than cold water for a given volume. See more

Your skin weighs about 3.2 kg. See more

A teaspoon of neutron star material weighs about 110 million tons. See more

Our eyes are always the same size from birth, but our nose and ears never stop growing. See more

Everyone is colourblind at birth. See more