1880 – Born on May 12th in Chicago, Illinois. American explorer, engineer, and scientist,
1902 – He helped survey the route for the Canadian transcontinental railway.
1903-1908 – Ellsworth was a surveyor and engineer in Canada for five years, worked for three years with the U.S. Biological Survey, and served in the U.S. Army in World War I, training as an aviator.
1924 – He led a surveying expedition across the Andes.
1925-1926 – He traveled with Roald Amundsen on his Arctic flights.
– Led the first trans-Arctic.
1935 – He made the first trans-Arctic crossing in the airship Norge with Umberto Nobile and the first flight across Antarctica.
– Ellsworth raised the U.S. flag over 300,000 square miles (777,000 square kilometers) of unclaimed land in Antarctica.
– He claimed for the USA some of the territory he flew over, Ellsworth Mountains and American Highland, an area of almost a million square kilometers.
1951 – Died on May 26th in New York.