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Dynamite is highly explosive. This is because it's a chemical reaction wait...More

If you've worn headphones, watched TV, worked on a computer, or ridden in a...More

Playing Tug-of-War, pedaling a bike, jumping rope - these actions all requi...More

During the 20th century, many things were invented that made people's lives...More

In 1872,Yellowstone became the first national park. Now,there are 59 nation...More

Sound waves are all around us creating a multitude of different frequencies...More

Light heats our skin, helps us see in the dark, and even helps cure cancer....More