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  April 21
1774:
Jean-Baptiste
Biot, co-developer of the
Biot-Savart
law of electromagnetic induction, was born. 1836: General Sam Houston defeated Santa
Anna at the
Battle of San Jacinto, which decided the independence of Texas.
1910: Samuel Clemens
(aka Mark Twain) died, the same year as an appearance of Halley's Comet and, amazingly,
the comet's previous appearance came during November 1835, the year of Clemens'
birth (throughout his life, Clemens said that he would "go out with the comet").
1918: German fighter ace
Manfred
von Richtofen, "The Red Baron," was shot down and killed during World War I.
1948: The first Polaroid camera was sold. 1972:
Apollo 16 astronauts
John Young and Charles Duke explored the surface of the moon in their LEM.
| 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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