Topic List

Attachments

April 21 April 23

April 22

updated Apr 22, 2010 by Steven Gilbert

1904 - J. Robert Oppenheimer, an American theoretical physicist, was born on this day. Oppenheimer is best known for his role as the director of the Manhattan Project, the World War II effort to develop the first nuclear weapons.

1915 - The use of poison gas in World War I escalated when Chlorine was released as a chemical weapon in the Second Battle of Ypres.

1970 - The first Earth Day or environmental teach-in was called for by Gaylord Nelson, a United States Senator from Wisconsin. Over 20 million people participated that year, and Earth Day is now celebrated annually on April 22.

previous day - next day

Labels:

Toxipedia is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 United States License

Powered by Atlassian Confluence and Zen Foundation