Were Carl Linnaeus and Napoleon alive at the same time?
Yes. Carl Linnaeus and Napoleon were alive at the same time for 8 years, from 1769 to 1778.
Carl Linnaeus was 62 when Napoleon was born.
Napoleon was 8 when Carl Linnaeus died, aged 70.
Carl Linnaeus
Swedish botanist, physician, and zoologist (1707–1778); developed the foundations of modern taxonomy
Born 23 May 1707 · died 10 January 1778, aged 70
Napoleon
French military leader, French Emperor 1804–1814 and again in 1815
Born 15 August 1769 · died 5 May 1821, aged 51