Biology
Microbiology
Consumers (food chain)

What is cyanobacteria?

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Wiki User
05/04/2008

Cyanobacteria are one of the earliest life forms known to have existed on Earth: stromatolites (which you can see on certain coastlines) are mounds of fossilised cynabacteria - the oldest ones to be found are about 3.5 million years old. Because cyanobacteria perform photosynthesis, they're believed to have been one of the main contributory factors to the rise in early atmospheric oxygen levels. Cyanobacteria still exist today; until recently we called them blue-green algae, & they look remarkably similar to their early cousins.