Today in History – April 22, 1970 – First Earth Day. Senator Gaylord Nelson, founder of Earth Day, says that the idea for Earth Day evolved over a period of seven years starting in 1962. He wanted President Kennedy to give visibility to pollution and the environmental degradation that was appearing throughout the country, but [...]

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Today in History – April 20, 1940 – RCA Demonstrates Scanning Electron Microscope (SEM). The history of the SEM begins in 1928 and RCA’s demonstration in 1940. In 1965 the first SEM was marketed by the Cambridge Instrument Company. The provided link includes an article that details the history of the SEM from 1928 to [...]

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Today in History – March 8, 1775 – Priestley discovers oxygen through experiments with mice. Oxygen was independently discovered in the 1770′s; the most famous names associated with this discovery are Joseph Priestley, Carl Wilhelm Scheele and Antoine Lavoisier. Credit is usually given to Joseph Priestley as he had the first publication on the discovery [...]

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Today in History – January 09, 1839 – Louis Daguerre announces his photographic process. The first permanent photograph was made in 1826 by Joseph Niepce. Together with Louis Daguerre they further refined the process. The process involved silver-coated copper plates mixed with iodine to create a layer of silver iodine. After being exposed to light [...]

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Today in History – December 10, 1964 – Nobel Peace Prize awarded to Dr. Martin Luther King Jr. The title of his Nobel lecture was “The Quest for Peace and Justice”. Martin Luther King, Jr. attended segregated public schools in Georgia, graduating from high school at the age of fifteen; he received the B. A. [...]

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