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Space Exploration Milestone - Mariner 2 50 Years Later
2012-12-13 05:51:51

Fifty years ago this Friday, America's space exploration ushered in a new era when NASA's Mariner 2 spacecraft became the first ever to study a planet other than our own.


Word of the Day
definiens
  • The word or words serving to define another word or expression, as in a dictionary entry.
The word 'definiens' comes from the Latin word 'definire', 'to define'.
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