The Formation of Vegetable Mould through the Action of Worms

What it is

This 1881 book by Charles Darwin, published by John Murray in London, examines the behaviour and ecology of earthworms and how their actions build up soil over long periods. It was his last scientific book, finished shortly before his death.

Why it matters

The idea began decades earlier, when Darwin's uncle Josiah Wedgwood pointed out how buried materials sank into soil, likely through earthworm activity. Darwin returned to this lowly subject across his life, and the book became a bestseller. It shows his recurring theme: small, gradual changes, repeated over long stretches of time, can produce large effects — the same logic underlying his theory of evolution.

Look closer

• Why might a famous scientist choose to spend his final years studying something as humble as earthworms?
• How does the idea of slow, cumulative change in this book connect to Darwin's theory of natural selection?
• What does the book's popularity with ordinary readers suggest about public interest in science at the time?