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How Newton’s Cradles Work
science.howstuffworks.com/innovation/inventions/newtons-cradle.htm
Five metallic balls on slender threads sit side by side. As one on the end hits the rest, the one on the opposite end rises and falls. Why don't the balls in the middle move? It's complicated.
Pearl Harbor Attack: What Led to It and What Was the Aftermath?
history.howstuffworks.com/world-war-ii/japan-bombs-pearl-harbor.htm
Japan's bombing of Pearl Harbor was the major event that caused the United States to enter World War II. Learn about the attack only at HowStuffWorks.
10 Construction Projects That Broke the Bank
science.howstuffworks.com/engineering/structural/10-construction-projects.htm
Whether we're trying to save a sinking city or dig a massive tunnel, our appetite for construction knows no bounds. But if designers had known the actual cost of these 10 projects, they might have gone back to the drawing board.
Are Dinosaurs Real? What We Know About the Extinct Creatures
science.howstuffworks.com/environmental/earth/geology/dinosaur.htm
Are dinosaurs real? Most people don't have to travel too far to answer that question in the affirmative with some kind of exhibit displaying dinosaur fossils. Or simply look at any bird you can see outside your home.