THIS DAY IN SCIENCE: Bali Tiger Is Extinct in 1937

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Steve Spangler’s Airmazing Solar Bag

Steve Spangler’s Airmazing Solar Bag

By Steve Spangler. A Solar Bag is a long plastic bag made from a very thin plastic and colored black to absorb solar energy. The heated air inside the bag provides buoyancy and causes the bag to float. Over the years, it’s become a very popular science demo for...
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