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Virgin Galactic's SpaceShipTwo Breaks Sound Barrier
2013-04-29 12:57:24

Virgin Galactic's SpaceShipTwo broke the sound barrier for the first time on Monday, reaching Mach 1.2 in a test flight.


Word of the Day
sipe
  • a slit in a tire to drain away surface water and improve traction.
The word 'sipe' comes from Old English and is related to 'seep'.
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