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How Sinkholes Work
science.howstuffworks.com/nature/natural-disasters/sinkhole.htm
Sinkholes are much more than holes in the ground. Learn how sinkholes can cause the Earth to swallow up you, your home and your car.
How Satellites Work
science.howstuffworks.com/satellite.htm
Thousands of satellites fly overhead every day, helping us with things like weather forecasts, scientific research, communications, TV broadcasts (and maybe some surreptitious spying). How much do you know about these eyes in the sky?
Nazi Germany Surrenders: February 1945-May 1945
history.howstuffworks.com/world-war-ii/nazi-germany-surrenders.htm
World War II ended in 1945 with Nazi Germany and Japan being defeated. Follow the events of World War II and the surrender of Nazi Germany and Japan.