Were John Milton and Isaac Newton alive at the same time?
Yes. John Milton and Isaac Newton were alive at the same time for 31 years, from 1642 to 1674.
John Milton was 34 when Isaac Newton was born.
Isaac Newton was 31 when John Milton died, aged 65.
Isaac Newton
English mathematician and physicist
Born 25 December 1642 (Julian calendar) · died 20 March 1727 (Julian calendar), aged 84