How Does Hair Grow?
How Does Hair Grow? Hair grows out of tiny openings (or follicles) in the skin. Each hair is a series of scaly cells piled one on top of the other. These hair scales...
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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 rays from the sun penetrate the...
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How Do Trees Grow Taller?
How Do Trees Grow Taller? Trees grow by producing new cells in a very limited number of places. These places of cell division are called meristems. Meristems are...
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What Causes Freckles?
What Causes Freckles? Freckles are caused by the brown skin pigment called melanin. All of us have some melanin in our skin. Usually, this brown pigment is evenly...
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How Do Honeybees Make Honey?
How Do Honeybees Make Honey? To make honey, honeybees drink the nectar of flowers, and store the liquid in a special part of their body called the honey stomach. When...
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