about lichens

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Lichens are a remarkable example of collaborative cooperation.

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They result from a symbiosis between two extremely different kinds of things.

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Each type of lichen is a collaboration between a fungus and an algae (sometimes also teaming up with a blue-green algae, which is technically a different sort of thing).

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Terrestrial life would hardly be possible without lichens,

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which have the rare ability to live on stones.

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(Some types have become more picky, and prefer to live on old wood.)

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As they gradually break down the stones, they create soil on which plants can live.

making possible all the other life we know.

The are also a boon to the near-sighted photographer.

They don't move

and they are very beautiful and varied.