This category contains 4 posts

5 close calls involving nuclear weapons

This article summarises 5 potentially catastrophic close calls involving nuclear weapons. A scientific rocket launch that almost triggered Soviet retaliation, because “U.S. notification of an upcoming satellite launch never made it up the chain of command” A defective computer chip almost triggered US nuclear launch A nuclear bomb fell off a plane above North Carolina 6 cruise missiles … Continue reading

Moving pictures – 6 years from concept to censorship

The incredible story of how “moving pictures” started in October 1888, until 6 years later in July 1894, when censorship caused a movie of a lady dancing to be replaced with a movie about cats, showing that cats were popular well before the start of the Internet! http://www.businessinsider.com.au/heres-a-startup-story-of-disruption-thats-more-than-120-years-old-2015-9/ The page has several GIFs showing snippets of … Continue reading

Origin of the peace symbol

I just heard on the Dr Derek Muller’s “Uranium: Twisting the Dragon’s Tail” documentary that the peace symbol was made by combining the two semaphore signals for N and D (for “Nuclear Disarmament”.)  =   + References: Trailer for Uranium: Twisting the Dragon’s Tail on YouTube Dr Derek Muller’s YouTube channel 1veritasium https://en.wikipedia.org/wiki/File:Peace_sign.svg https://en.wikipedia.org/wiki/File:Semaphore_November.svg https://en.wikipedia.org/wiki/File:Semaphore_Delta.svg https://en.wikipedia.org/wiki/Uranium_–_Twisting_the_Dragon’s_Tail  

Beautiful photo series showing building of Golden Gate Bridge

This photo series shows the Golden Gate Bridge in San Francisco being built throughout the 1930’s http://mashable.com/2015/05/21/golden-gate-bridge-construction/ Here is one of those images, showing the bridge with partially completed roadways, circa 1936.