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X-37B Launch Successful
2012-12-11 19:05:38

The Air Force's mysterious robotic space plane X-37B launched successfully on Tuesday afternoon, kickstarting another one of its secretive missions.


Word of the Day
ecotone
  • A transitional zone between two communities containing the characteristic species of each.
The word 'ecotone' comes 'eco-' plus a Greek root meaning 'tension'.