On a Piece of Chalk
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Description
On A Piece Of Chalk is a scientific essay written by Thomas Henry Huxley, a prominent biologist and supporter of Charles Darwin's theory of evolution. The essay was originally presented as a lecture in 1868, and later published as a book. In this essay, Huxley explores the properties and formation of chalk, a type of sedimentary rock made up of microscopic marine organisms called coccolithophores.
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