Dr. Jack Cohen (1933-2019)

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Doctor Jack Cohen, biologist and SF author, died yesterday. He's probably best known outside the academic community for the Science of Discworld books, and also gave scientific advice to a lot of other SF authors including Anne McCaffrey, Niven and Pournelle, etc., me (for the Flatland RPG I wrote especially) and many others.He'd been in a hospice for some time, and his death wasn't unexpected.

He'll really be missed from the British SF scene.

https://en.wikipedia.org/wiki/Jack_Cohen_(scientist)