“What are lichens? They are neither plant nor animal. If that doesn’t make them inscrutable enough, there is also this: A lichen might, at first glance, be mistaken for an errant wad of chewing gum or a misplaced splatter of paint.But they are very much living creatures and are thought to be one of the earliest land-dwelling forms of life. They are among the most widespread, too, present on every continent, covering an estimated 8 percent of the planet’s land. They inhabit even Antarctica and the harshest deserts, including some places where plants and animals cannot thrive. Closer to home, you may find them happily taking up residence on your wooden garden bench or picket fence, stone walls or other rock surfaces, or on the trunks and branches of trees and shrubs. ...”
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