Can Fish Drown?
Fish can drown under certain conditions. It isn’t the water that keeps fish alive, but the oxygen in the water. Fish breathe oxygen, just as we do. The water...
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How Was the Controlled Use of Fire Discovered?
How Was the Controlled Use of Fire Discovered? According to the Greek mythology, Prometheus stole fire from the gods and gave it to humans. Many Native American...
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Why Is Blood Red?
Why Is Blood Red? Blood gets its red color from a substance called “hemoglobin.” Hemoglobin has a molecule called a “heme” which has the metal...
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What Is Fertilizer?
What Is Fertilizer? Plants need six basic nutrients to survive: carbon, hydrogen, oxygen, nitrogen, phosphorus, and potassium. The first three — carbon, hydrogen, and...
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Why Do Earthworms Come out When It Rains?
Why Do Earthworms Come out When It Rains? Earthworms come to the surface of the ground in heavy rains to avoid being drowned. Earthworms stay underground most of the...
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