Archaeologists have discovered a set of conical tombs dating back to more than 3,000 years ago in Mexico. The pre-Hispanic tombs—half of which still contain human remains—were found in Chapultepec ...
Why do tornadoes have the shape of an inverted cone? • Exactly how tornadoes form is not completely understood, but we know that they usually occur during thunderstorms and when volumes of air are ...
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