Template:Are You Sure/April 22

The Santa Barbara oil spill occurred in January and February 1969 in the Santa Barbara Channel, near the city of Santa Barbara in Southern California. It was the largest oil spill in United States waters by that time, and now ranks third after the 2010 Deepwater Horizon and 1989 Exxon Valdez spills. It remains the largest oil spill to have occurred in the waters off California. Denis Hayes, organizer of Earth Day observance day, said that Senator Gaylord Nelson from Wisconsin was inspired to create Earth Day upon seeing Santa Barbara Channel 800 square-mile oil slick from an airplane.

• ... that British cryptographer and intelligence officer Sir Edward Wilfred Harry Travis (1888–1956) became the operational head of Bletchley Park during World War II, and that Travis was later the head of GCHQ (Government Communications Headquarters), an intelligence and security organisation responsible for providing signals intelligence and information assurance to the government and armed forces of the United Kingdom?

• ... that nuclear physicist Denys Wilkinson (1922–2016) applied concepts from physics to the study of bird navigation?

• ... that astronomer, academic, and inventor Wilhelm Schickard (1592–1635) designed a mechanical adding machine which sounds an audible warning when an output is too large for the available dials?

• ... that Earth Day is an annual event celebrated on April 22, that it was first celebrated in 1970, and that Earth Day events in more than 193 countries are now coordinated globally by the Earth Day Network?