Charles Darwin died 130 years ago today, leaving an intellectual legacy which has profoundly influenced the general course of Western thought. He is best known for his work On the Origin of Species (1859) and (1871), both of which introduced radical new ideas for the time concerning the origins of humans and all life. Darwin's last work, however, devoted itself entirely to a more down-to-earth species: the lowly earthworm.
In his final book, (1881)L. Sambourne's satiric portrait of Darwin published in Punch, 1881., Darwin concluded, "It may be doubted if there are any other animals which have played such an important part in the history of the world as these lowly organized creatures." If the concept of evolution didn’t give Darwin enough grief from his contemporaries, this monograph on worms provoked even more ridicule. But Darwin had the last laugh: The book was a runaway best-seller. Although its title would never fly with today's publishers, the book nevertheless sold more copies than his earlier books, due largely to England's healthy obsession with gardening.
The Tower of Babel? No, one of the more elegant illustrations of worm poop (or castings) published by DarwinWith the help of his children, with whom he set out early each morning (and often on rainy nights) while the ground was still cool and moist, Darwin observed and recorded the habits of the earthworm and its effect on soil formation. Darwin learned that worms literally move the earth in the process of their meanderings. Their passage through the earth aerates the soil and the natural chemistry of their guts renders soil and plant matter into fertile pellets. As a by-product of their movements, worms deposit new soil on the surface, causing whatever was on top to slowly submerge. Thus, whole monuments may be buried over a period of decades. It is estimated that for a single acre of cultivated land, earthworms move 8 tons of earth in a year, enough to produce a new layer of earth 2 inches thick, rich in nitrogen, phosphorous and calcium.
Before the plough, the earthworm was the earth’s best tiller, as it digested earth and munched on leaves, leaving behind a rich hummus layer. Vermiculture enthusiasts will agree that worm juice (or "compost tea") collected beneath their compost bins is a superior organic fertilizing agent for their gardens.
The Formation of Vegetable Mould through the Action of Worms, with Observations on their Habits (sometimes shortened to Worms) is an 1881 book by Charles Darwin on earthworms. It was his last scientific book, and was published shortly before his death (see Darwin...
