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      NASA· 6 days ago

      Glenn's innovative DELTA convertor uses a double-action push/pull piston, in which an acoustic wave - or sound wave generated by heat - pushes both ends ...

    • 30 crazy weather facts you won't believe are true

      30 crazy weather facts you won't believe are true

      LoveEXPLORING via Yahoo News· 2 days ago

      Known by many names, including The Great Cold Wave and The Great Arctic Outbreak, February of that year was so cold the Mississippi River froze over its...