History of the Universe

   

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Biological Environment > Lichen

Earth Earlier Earlier  450 Million Years ago Later Earth After

This site tells the story of the history of the universe. Click Earlier and Later to follow the story. Note: Many facts have been simplified to make them easier to understand.

 
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A lichen ("ly-ken" or "li-chen") is a combination of a fungus and either a blue-green bacteria or green algae which lives inside it. The fungus gets food from the algae or bacteria and they get a safe home from the fungus. This is an example of symbiosis.

Lichens might have been the first things to live on land. Today they invade new islands made by volcanoes before any other form of life.

   
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Earth Earlier Earlier  450 Million Years ago Later Earth After

Biological Environment > Lichen

   

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