What Causes the Colors We See Around Us?
What Causes the Colors We See Around Us? Color is a perception that arises from the responses of our visual systems to light in the environment and light is the cause...
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How Did the White House Get Its Name?
How Did the White House Get Its Name? The home of the president of the United States gets its name from its white walls. But the White House wasn’t always white,...
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Why Does Hair Turn Gray When People Are Old?
Why Does Hair Turn Gray When People Are Old? Different hair colors, from blond to black, are determined by the melanin, or coloring matter, in your hair cells. This...
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Why Do We Have Half-moons under Our Fingernails?
Why Do We Have Half-moons under Our Fingernails? The pale half-moon area at the base of the fingernail is known as the lunula (luna is the Latin word for “moon”). All...
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Why Are There Colors?
Why Are There Colors? Sunlight may appear to be white, but it is actually a mixture of all the colors that can be seen in a rainbow – red, orange, yellow, green,...
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