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#7901
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#7902
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#7903
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![]() ![]() The requirements for landing space shuttles led NASA scientists to do extensive research on minimizing hydroplaning -- when vehicles slide uncontrollably on a wet surface -- on runways. They discovered that cutting grooves into runways helps channel water away from the runway and significantly reduces accidents. Many highways and airports now have grooved pavement. |
#7904
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![]() ![]() In the sealed, artificial environment of a spacecraft, attempts to grow plants have led to ethylene buildup. NASA invented an air purifier for the International Space Station that is now used widely on Earth -- everywhere from restaurants, to hospitals, to refrigerators -- to remove ethylene, which hastens decay, as well as other particulates and pathogens. |
#7905
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#7906
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![]() Quote:
Do your homework before bidding.... |
#7907
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#7908
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#7909
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#7910
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