Why Does Skin Color Vary?
Why Does Skin Color Vary? People vary in the color of their skin because of a network of pigment-forming cells called melancoytes. This netw
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Why Does My Hair Turn Light in the Sun?
Why Does My Hair Turn Light in the Sun? Hair color comes from a pigment, melanin that is added to your hair as it is made in the skin of you
Why Do We Get Sunburned?
Why Do We Get Sunburned? Sunburn is the result of over-exposure to sunlight, which causes heat and light damage to the skin. Ultraviolet ray
How Hungry Are Hippos?
Hippos really are hungry, but not as hungry as you might expect. They only eat about 1% of their total body weight each day. Othe
Why Do Pigs Wallow in Mud?
Pigs wallow in the mud because it feels good to them. Rolling around in the mud protects them from overheating. Pigs have no sweat glands in