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SlideshowReport

Earliest fossils and living cyanobacteria

Description
(a) A fossilized prokaryote about 3.5 billion years old that is thought to be an early cyanobacterium. (b) A modern cyanobacterium, which has a similar morphology. Cyanobacteria are unicellular, but they aggregate into chains as shown here.
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Comments (1)
10 years ago
It appears as though the glass is shattered on the left.
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