John Emsley (born 1938) is a UK popular science writer, broadcaster and academic specialising in chemistry. He researched and lectured at King's College London for 25 years, authoring or co-authoring about 100 papers, and then became Science Writer in Residence at Imperial College London in 1990. From 1997 to 2002 he was Science Writer in Residence at the Department of Chemistry at Cambridge University, England, during which time he started and wrote the newsletter Chem@Cam.
He is the author of more than 12 books and several of them have been translated into other languages.
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