Why Are Convection Heaters So-called?
Heating appliances specially designed to create a circulating movement of warmed air are called convection heaters because they operate by using convection currents of...
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Who Was Galileo Galilei?
Galileo Galilei (1564-1642), the great Italian scientist and mathematician, was the first astronomer to use a telescope, the discoverer of the pendulum’s laws and the...
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Why Do We Call Galileo by His First Name Only?
The surname Galilei derives from the given name of an ancestor, Galileo Bonaiuti, a physician, university teacher and politician who lived in Florence from 1370 to...
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Why Does Bread Have Holes in It?
The holes in a piece of bread are made by bubbles of gas. In bread making, flour and water are mixed to form dough. Then a small amount of yeast is added to the...
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When Did the Publication of Comic Books Begin?
Comics as a print medium have existed in America since the printing of The Adventures of Mr. Obadiah Oldbuck in 1842 in hardcover, making it the first known American...
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