Full of Energy

Where are the horses?

Imagine a team of horses—fifty or a hundred or even more—pulling your car down the highway! Actually, your car’s engine has that much pulling power—the pulling power of a certain number of…

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Meet the Trees

Christmas tree favorites

Which is your favorite kind of Christmas tree? People in the United States and Canada usually choose the balsam fir, the black spruce, or the Douglas fir. People in Britain, Germany, and most of…

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Mathemagic

The minus mystery

> Mildred Minuette wrote mystery stories. Her books were very popular. > In fact, they were so popular that her fans showed up at all hours of > the day and night, begging for autographs. Mildred was…

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