Changes

* 1953, scientists James D. Watson and Francis H.C. Crick announced they had discovered the double-helix structure of DNA, the molecule that contains the human genes

* 1953, scientists James D. Watson and Francis H.C. Crick announced they had discovered the double-helix structure of DNA, the molecule that contains the human genes

* 1972, President Nixon and Chinese Premier Chou En-lai issued the Shanghai Communique at the conclusion of Nixon's historic visit to [[Directory:China]]|China]]

* 1972, President Nixon and Chinese Premier Chou En-lai issued the Shanghai Communique at the conclusion of Nixon's historic visit to [[Directory:China|China]]

* 1986, Swedish Prime Minister Olof Palme was shot to death in central

* 1986, Swedish Prime Minister Olof Palme was shot to death in central