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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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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Why Are There Leap Years?
Why Are There Leap Years? To answer this question, you need to remember that a year is measured by the amount of time it takes the earth to make one trip around the...
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What Is a Light-year?
What Is a Light-year? Space is so vast that scientists don’t use miles to measure how far stars are away from us. The number of miles would be too large to work...
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How Deep Is the Deepest Spot in the Ocean?
How Deep Is the Deepest Spot in the Ocean? Off the island of Guam in the Pacific Ocean is a very deep, crescent-shaped trench called the “Mariana Trench.” Near the...
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