Nature Live Online: Lichens

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Although lichens are everywhere, these bizarre and complex life forms tend to be overlooked.

They are the result of symbiotic relationships between algae and fungi, and they come in a wonderful variety of colours, shapes and sizes. Join scientist Holger Thüs in a chat with Cristina Torrente to find out more about how these life forms can be useful for humans. That is, if our impact on the planet doesn't irremediably affect them first.

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