What Gives Opals Their Colors?
What Gives Opals Their Colors? The beautiful flashes of color given off by a precious opal as it is turned and viewed from different angles are caused by the various...
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Does an Ostrich Hide Its Head When It Is Frightened?
Does an Ostrich Hide Its Head When It Is Frightened? No, an ostrich doesn’t hide its head when it is frightened. According to this old belief, the ostrich hides...
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What Is Quicksand?
Quicksand is a deep mass of sand so mixed with water that it will not support any weight. It forms when ground water pushes up and mixes into the sand above, making it...
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Does Quicksand Suck Things Down?
Does Quicksand Suck Things Down? No – quicksand does not actually suck anything down. In fact, quicksand is rarely more than a few feet deep; you can float in...
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What Is the Distinction Between Cement and Concrete?
What Is the Distinction Between Cement and Concrete? Cement is a fine, grayish powder. In general terms, the word cement refers to any kind of binder that tightly holds...
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