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What practical problems have been solved between the late 18th century and late 20th century?

By Ryan Smith Asked Apr 6 2009 8:52PM
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Top Answer out of 3

by PaulD1600 on May 2, 2009 at 11:53 am Permalink

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We discovered how to pack 2 days worth of calories into one burger.
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Answer 2 out of 3

by Bookworm on Apr 6, 2009 at 8:57 pm Permalink

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Safe drinking water

Hot water you don't have to haul from outside, heat on the fire, then haul to the bathtub.
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Answer 3 out of 3

by Gnome of Kevonia - COAT of sage on Oct 24, 2009 at 3:13 pm Permalink

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Cushioning occupants from hitting hard objects in car crashes.
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What practical problems have been solved between the late 18th century and late 20th century?

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