Who First Traveled the Length of the Amazon?
A party of Spanish explorers led by Francisco de Orellana became in 1541 the first Europeans to travel the length of the Amazon River. The journey followed a meeting in...
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Is the Moon Moving Farther Away from Earth?
As the Moon travels around Earth, it affects Earth’s rotation. Scientists have determined that the Moon slowly gets farther away from Earth at the rate of about...
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Where Is the Gulf Stream?
The Gulf Stream is in the Atlantic. It is a warm ocean current which flows steadily from the Gulf of Mexico north-eastwards. One branch reaches the Canary Islands,...
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How Were the First Mountains and Valleys Formed?
The first mountains and valleys were the crust formed as a result of the cooling of the molten mass of the earth. As the planet contracted the crust twisted and...
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What Is a Depression?
A depression is an area of low pressure, usually bringing unsettled weather. A deepening depression has a lowering of pressure at its center. The profile of a...
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