How Do Starfish Move About?
How Do Starfish Move About? A starfish (or sea star) creeps along the bottom of the sea in a rather peculiar way. It has hundreds of tiny tube-like “feet”...
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Why Do Owls Turn Their Heads to Look Around?
Why Do Owls Turn Their Heads to Look Around? Since an owl cannot move its eyes around like a person can, it has to turn its whole head in order to look in another...
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How Do Fish Maintain Buoyancy?
How Do Fish Maintain Buoyancy? Fish live in a three-dimensional environment. Instead of just worrying about moving forward, backward and to the sides, fish must also...
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What Is Sea Level?
We say that Mount McKinley in Alaska is 20,320 feet above sea level, or that Death Valley, in California, is 282 feet below sea level. And we say that the surface of...
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What Is the Continental Drift Theory?
What Is the Continental Drift Theory? Long ago there was only one continent on earth, a huge super-continent which geologists now call “Pangaea,” a Greek...
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