Why Does Poison Ivy Itch?
Why Does Poison Ivy Itch? Woods, seashores, even parks and suburbs contain poison ivy. Never touch poison ivy. It can make your skin itch and blister. The poison that...
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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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How Is the Nose Able to Smell?
How Is the Nose Able to Smell? Smells, or odors, are caused by tiny particles called molecules, which are constantly emitted by the many different substances around us....
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When Was Candy First Eaten?
When Was Candy First Eaten? It is impossible to pinpoint exactly when candy was invented and who was responsible. The word candy comes from the Persian word qandi, but...
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Why Does the Road Look Wet on a Hot Summer Day?
Why Does the Road Look Wet on a Hot Summer Day? On a hot summer day, while driving along the highway, you may see something that looks like a pool of water ahead of you...
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What Is a Space Needle?
The Space Needle is an observation tower in Seattle, Washington, a landmark of the Pacific Northwest, and an icon of Seattle. It was built in the Seattle Center for the...
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What Is the International Space Station?
What Is the International Space Station? Visible from Earth with the naked eye, the International Space Station (ISS) is habitable satellite that serves as a micro...
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How Does a Rocket Engine Work?
How Does a Rocket Engine Work? You can make a simple rocket by filling a toy balloon with air and letting it go. Rockets work on the Newton’s principle that every...
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How Did We Get the Word Nickname?
How Did We Get the Word Nickname? A nickname is a substitute for the proper name of a familiar person, place, or thing, for affection or ridicule. A nickname is often...
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What Is the Great Wall of China?
What Is the Great Wall of China? More than two thousand years ago, the Chinese emperor Qin Shih Huang Ti decided to build a huge wall to keep out his enemies. It came...
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