John D. Barrow

John David Barrow (29 November 1952 – 26 September 2020) was an English cosmologist, theoretical physicist, and mathematician. He was Gresham Professor of Geometry at Gresham College from 2008 to 2011. 
Barrow was also a writer of popular science and an amateur playwright.
Barrow died on 27 September 2020 from colon cancer, aged 62.