Scientific book about earthworms by Charles Darwin, 1881
The Formation of Vegetable Mould Through the Action of Worms, with Observations on their Habits is an 1881 book by Charles Darwin on earthworms. It was his last scientific book, and was published shortly before his death (see Darwin from Insectivorous Plants to Worms). Exploring earthworm behaviour and ecology, it continued the theme common throughout his work that gradual changes over long period... Wikipedia