Historical Events April 22.

1056: A supernova exploded in the Crab Nebula.

1500: Portuguese sailor Pedro Alvares Cabral discovered Brazil.

1915: German army used poisonous gas chlorine for the first time in World War I.

1958: Admiral R. D. Katari became the first Chief in the Independent Indian Navy.

1970: Millions of Americans celebrated Earth Day for the first time to increase environmental awareness around the world.

1977: The first optical fiber used to introduce telephone traffic.

2006,: Praveen Mahajan fired at BJP leader Pramod Mahajan over a family dispute.

Famous Birthdays April 22

1724: Immanuel Kant, a German philosopher.

1812: Lord Dalhousie, a Scottish statesman and colonial administrator in British India. He served as Governor-General of India.

1870: Vladimir Lenin, a Russian revolutionary, politician, and political theorist.

1904: J. Robert Oppenheimer, an American theoretical physicist, and professor of physics.

1904: Ramnath Goenka, an Indian newspaper publisher.

1916: Kanan Devi, an Indian actress, and singer.

1971: Sumeet Raghavan, an Indian film and television actor.

1974: Chetan Bhagat, an Indian author, and columnist.

Death anniversaries April 22

1933: Henry Royce, co-founder of Rolls-Royce Limited.

1994: Richard Nixon, the 37th president of the United States.

2003: Balwant Gargi, an Indian Punjabi language dramatist, theatre director, novelist, and short-story writer.

2013: Lalgudi Jayaraman, an Indian Carnatic violinist, vocalist, and composer. 

2013: Jagdish Sharan Verma, the 27th Chief Justice of India.