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NASA's Chief Sniffer's Job Is to Keep 'Stinky' Situations Out of Space
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Nobody's nose knows better than NASA's George Aldrich. He's the longest-serving member of the space agency's odor panel, which basically sniffs and smells everything that goes up into space.
How the Machine Gun Revolutionized Warfare
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The invention of the machine gun forever changed the battlefield. While soldiers once had to reload after a single shot, they now can fire hundreds of rounds per minute without a single pause.
How Blast-resistant Clothing Works
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Your most rugged pair of blue jeans can't hold a candle to the cutting-edge blast-resistant clothing and technology. Sure, these fabrics are tough, but can they diffuse bomb blasts?
How the U.S. Coast Guard Works
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Unique among the U.S. armed forces, the Coast Guard is perpetually on active duty, entrusted with lots responsibilities and chronically underfunded. Learn about the U.S. Coast Guard.
How the Zumwalt Class Destroyer Works
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The Zumwalt is the military's class of next-generation destroyers. Find out how the Zumwalt class destroyer works and learn about Zumwalt technology.
How the U.S. Navy Works
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The U.S. Navy is the biggest in the world. It is divided into operating forces and shore establishment.
10 New Uses for Old Inventions
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You think you really know an invention until -- whammo -- someone comes up with a new use for it. Ointment that soothes tired cow teats and treats baldness? Who would have thought?
10 Outrageous Experiments Conducted on Humans
Some truly bizarre and troubling things have been done through the ages in the quest for scientific knowledge. The 10 experiments on this list all made humans into lab rats.
How Gas Masks Work
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Gas masks are used to filter out harmful gas and particles from the air industrial workers breathe. Learn about gas masks and how gas masks are made.
Boeing B-29 Superfortress
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The Boeing B-29 Superfortress was the biggest, most expensive gamble by the United States during World War II, built with incredibly high expectations on a tight deadline. Read about the big advances in aviation technology brought about by the B-29.