2015 Event Scientists have concluded that a large ocean exists beneath the icy surface of Ganymede, the largest moon of Jupiter; the discovery was made by using the Hubble Space Telescope to observe aurora movements at the moon's poles 2014 Event A long-delayed review of the Keystone XL Pipeline is completed by the U.S. State Department; it concluded the pipeline would not significantly increase greenhouse gas emissions 1871 Event Peace of Frankfurt-am-Main concluded between France and Germany 1809 Event Treaty of Dardanelles concluded between Britain and France
