June 19

This Day in History

1953

Rosenbergs executed

On June 19, 1953, despite international pleas for clemency, U.S. civilians Julius and Ethel Rosenberg are executed in the electric chair in Ossining, New York. Known for their communist leanings, they … (more...)

240

Eratosthenes Estimates Earth’s Circumference

On this day in 240 BCE Greek astronomer, geographer, mathematician, and librarian Eratosthenes is said to have calculated Earth's circumference. His figures were later found to be astonishingly … (more...)