Were Antonie van Leeuwenhoek and Johann Sebastian Bach alive at the same time?
Yes. Antonie van Leeuwenhoek and Johann Sebastian Bach were alive at the same time for 38 years, from 1685 to 1723.
Antonie van Leeuwenhoek was 52 when Johann Sebastian Bach was born.
Johann Sebastian Bach was 38 when Antonie van Leeuwenhoek died, aged 90.
Antonie van Leeuwenhoek
Dutch scientist known as "the Father of Microbiology", and one of the first microscopists
Born 24 October 1632 · died 26 August 1723, aged 90
Johann Sebastian Bach
German composer
Born 21 March 1685 (Julian calendar) · died 28 July 1750, aged 65