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This blue-green microbe called a cyanobacterium was likely the first photosynthetic...
Tardigrades, which are usually less than 1 mm long, can be found in almost every...
A spectacled caiman (Caiman crocodiles) patrols a salty pond at the Smithsonian...
Microscopic, single-celled organisms called foraminifera have a fossil record that...
Thu, 03/25/2010 - 16:23