Every morning during certain seasons of the year, the thrushes and blackbirds on all the lawns throughout the country draw out of their holes an astonishing number of worms; and this they could not do, unless they lay close to the surface.

— Charles Darwin, The Formation of Vegetable Mould through the Action of Worms (1881)

Source: http://darwin-online.org.uk/content/frameset?pageseq=17&itemID=F1357&viewtype=image

From chapter 1 of his 1881 book on earthworms.

Topics: learning