What Is a Sailing Vessel?
A sailing vessel is a ship powered by the wind, using sails. The earliest sailing ships were reed craft used in Mesopotamia circa 5000…
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Wind
Where Does Beach Sand Come From?
The answer lies in a process called erosion. That’s the slow wearing away of an object by natural forces. In this case, the erosion…
What Is the Mistral?
Mistral is the name given to a wind which blows in the Rhône Valley in France. The wind is caused by an exchange of…
What Makes the Wind?
Wind is the movement of air across the surface of the earth, caused by warm air rising and being replaced by cooler air. Except…
Why Does the Sahara Change Shape?
The Sahara, the world’s greatest dry hot desert, stretches right across the north of Africa where there is almost no rainfall and, consequently, little…