Were Isaac Newton and Giacomo Casanova alive at the same time?
Yes. Isaac Newton and Giacomo Casanova were alive at the same time for 1 years, from 1725 to 1727.
Isaac Newton was 82 when Giacomo Casanova was born.
Giacomo Casanova was 1 when Isaac Newton died, aged 84.
Isaac Newton
English mathematician and physicist
Born 25 December 1642 (Julian calendar) · died 20 March 1727 (Julian calendar), aged 84