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  April 11
1875:
Samuel Schwabe,
who first documented the roughly 10-year sunspot cycle, died. 1900: The U.S. Navy
acquired its first submarine. 1908:
Masaru Ibuka, who founded the company that became Sony Corporation,
was born. 1921: KDKA
broadcast the first radio sporting event - a boxing match. 1945: During World War
II, American soldiers liberated the Nazi concentration camp of
Buchenwald. 1957: A
Ryan X-13
Vertijet became the first jet to take-off and land vertically. 1970:
Apollo 13 blasted off on a mission to the moon that was disrupted
when an explosion crippled the spacecraft; the astronauts managed to return safely.
1984: Challenger astronauts completed the first in-space satellite repair on the
Solar Max. 1986:
Halley's Comet made its closest approach to Earth this latest appearance. 2001:
China Agreed to Release 24 Crewmembers of a U.S.
EP-3E Surveillance Plane.
| 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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