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Explosive Evolution Need Not Follow Mass Extinctions
2012-02-14 04:26:34

Following one of Earth's five greatest mass extinctions, tiny marine organisms called graptoloids did not begin to rapidly develop new physical traits until about 2 million years after competing species became extinct.


Word of the Day
gammon
  • To play, gamble.
  • To impose upon; delude; trick; humbug; also, to joke; chaff.
  • A deceitful game or trick; trickery; humbug; nonsense.
The word 'gammon' in the sense of 'joke, trick' may come from 'backgammon'.
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