Difference between revisions of "February 23"
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* 1987: A supernova was detected in the relatively nearby Large Magellanic Cloud by an astronomer at Chile's Las Campanas Observatory; because it is so close (and actually visible to the naked eye), it became the object of intense study. | * 1987: A supernova was detected in the relatively nearby Large Magellanic Cloud by an astronomer at Chile's Las Campanas Observatory; because it is so close (and actually visible to the naked eye), it became the object of intense study. | ||
| − | * 1954: The first mass inoculation of children against poliomyelitis took place, in Pittsburgh, | + | * 1954: The first mass inoculation of children against poliomyelitis took place, in Pittsburgh, [[Directory: Pennsylvania|Pa.]], testing the vaccine developed by Jonas Salk. |
* 1848: John Quincy Adams, the former president of the [[Directory:United States of America|United States]], died at the U.S. Capitol, where he collapsed at his desk from a stroke; he had served in the House of Representatives since 1831. | * 1848: John Quincy Adams, the former president of the [[Directory:United States of America|United States]], died at the U.S. Capitol, where he collapsed at his desk from a stroke; he had served in the House of Representatives since 1831. | ||
Revision as of 18:18, 23 February 2008
February 23 in history:
- 1997: Dr. Ian Wilmut and his colleagues at the Roslin Institute, Edinburgh, Scotland, announced that they had succeeded in cloning a lamb called Dolly from the mammary gland of an adult sheep.
- 1991: President George Bush announced that the ground assault to expel Iraqi forces from Kuwait during the Persian Gulf War had begun; in the Middle East, it was already February 24.
- 1987: A supernova was detected in the relatively nearby Large Magellanic Cloud by an astronomer at Chile's Las Campanas Observatory; because it is so close (and actually visible to the naked eye), it became the object of intense study.
- 1954: The first mass inoculation of children against poliomyelitis took place, in Pittsburgh, Pa., testing the vaccine developed by Jonas Salk.
- 1848: John Quincy Adams, the former president of the United States, died at the U.S. Capitol, where he collapsed at his desk from a stroke; he had served in the House of Representatives since 1831.
- 1836: During the Texas Revolution, Mexican general Antonio López de Santa Anna began his siege of the Alamo.
