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Latest Lisa M. Nowak Stories

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2007-02-07 09:10:00

American astronauts undergo a psychological assessment when they join NASA but face no further evaluations during their careers unless issues arise during their annual flight physicals, the space agency said yesterday.


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'.