Why I Love Lichens But Oppose Nuclear Power

Nature has unexpected sensors. Students are always astonished to learn that litmus, the simplest of acid-base indicators, is extracted from lichens. Lichens, which have no roots but a thallus, also bioconcentrate SO2 pollution and radioactive fallout from the air.┬áThe thallus is the non reproductive part of the lichen that, depending on the genus, can have... Continue Reading →

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