Episode 645: Completely full, half with liquid and half with air!

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On This Day In History for June 30, 2021

This is the 181st day of the year in the Gregorian calendar. There are 184 days remaining in 2021.

  • It was on this date in 1886, that The first transcontinental train trip across Canada departed from Montreal, Quebec. It arrives in Port Moody, British Columbia on July 4
  • June 30, 1905, Albert Einstein sent the article On the Electrodynamics of Moving Bodies, in which he introduced special relativity, for publication in Annalen der Physik
  • It was also this date in 1906 that The United States Congress passed the Meat Inspection Act and Pure Food and Drug Act
  • On June 30, 1908, The Tunguska Event, the largest impact event on Earth in human recorded history, resulted in a massive explosion over Eastern Siberia
  • Also on June 30, 1937, The world’s first emergency telephone number, 999, was introduced in London
  • It was on this date in 1953, that The first Chevrolet Corvette rolled off the assembly line in Flint, Michigan
  • Also on June 30, 1972, The first leap second was added to the UTC time system

Happy birthday goes out on this date to:

  • American actress, singer, and activist, Lena Horne, born on this date in 1917.
  • Born June 30, 1919, American inventor of the modern hot air balloon Ed Yost.
  • American biochemist and academic, Nobel Prize laureate, Paul Berg, born on this date in 1926.
  • American magician and author, Harry Blackstone Jr. was born 87 years ago today.
  • American lieutenant and oceanographer, Robert Ballard, born on this date in 1942.
  • Greek mathematician and academic, Athanassios S. Fokas is 69 today.
  • American computer scientist and programmer, Lynne Jolitz, born on this date in 1961.
  • American-Canadian astrophysicist and academic, Victoria Kaspi is 54 today.

Listener Birthdays

  • 30 – Alexis Duran (ADdude)
  • 4 – Mike McBride
  • 6 – Peter (1982, Sweden)

And that’s the way it was, on this day in history for June 30, 2021

  • If you want to get on the Technorama Birthday Calendar, visit our website and look for the Birthday Calendar link.


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  • What movie can be completely spoiled by a very small piece of information?

Patreon Topic this week

    • A ship in port is safe, but that’s not what ships are built for
      • Grace Murray Hopper

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