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  April 20
1862: The first test of pasteurization was completed by Louis Pasteur and Claude
Bernard. 1902: Marie and Pierre Curie isolated the radioactive element
radium. 1918:
Ferdinand Braun, who shared a Nobel Prize with Guglielmo Marconi
for the development of wireless telegraphy, died. 1928: English astronomer
Gerald Hawkins,
who first identified Stonehenge
as an astronomical observatory, was born. 1961:
FM stereo multiplex
broadcasting was approved by the FCC. 1967:
Surveyor
3 landed on the moon and began sending photos back to the U.S. 1978:
Korean Air Flight 902 was shot down while in Russian airspace.
1989: The first successful testing of high-definition TV was announced. 1994: The
WebCrawler search engine, brainchild of Brian Pinkerton,
went online at the University of Washington. 1999: Eric Harris and Dylan Klebold
shot and killed 12 classmates and 1 teacher before taking their own lives at
Columbine High School in Littleton, CO.
| Jan
| Feb | Mar |
Apr | May |
Jun | Jul |
Aug | Sep |
Oct | Nov |
Dec |
Note: These
historical tidbits have been collected from various sources, mostly on the Internet.
As detailed in
this article, there
is a lot of wrong information that is repeated hundreds of times because most websites
do not validate with authoritative sources. On RF Cafe, events with
hyperlinks have been verified. Many years ago,
I began commemorating the birthdays of notable people and events with
special RF Cafe logos.
Where available, I like to use images from postage stamps from the country where
the person or event occurred. Images used in the logos are often from open source
websites like Wikipedia, and are specifically credited with a hyperlink back to
the source where possible.
Fair Use laws permit
small samples of copyrighted content.
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