Were Epicurus and Eratosthenes alive at the same time?
Yes. Epicurus and Eratosthenes were alive at the same time for 5 or 6 years, from 276 BC to 270 BC.
Eratosthenes was 5 or 6 when Epicurus died.
Eratosthenes
Greek mathematician, geographer, poet, astronomer, librarian and music theorist
Born 276 BC · died 194 BC