| 1648 | | 24 Oct:
The Thirty Years War ends with the signing of the Treaty of Westphalia.LoC Avalon |
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| 1884 | | 13 Oct:
The Greenwich meridian is officially adopted globally as the prime meridian, the imaginary north-south line where the longitude is 0 degrees.W I R E D MAA |
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| | 1 Nov:
Greenwich Mean Time is adopted universally when the International Meridian Conference meets in Washington, DC.GMT OFA |
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| 1897 | |
| 1906 | | 3 Nov:
The distress signal S.O.S. becomes the worldwide standard at the 2nd International Radiotelegraphic Convention.SIMag GA&C |
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| 1918 | | Feb:
The Spanish Flu pandemic kills at least 3% of the World's population.VLib npr |
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| 1938 | | 16 Nov:
Lysergic acid diethylamide (LSD) is first synthesized by Dr. Albert Hofmann.CV PSR |
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| 1943 | | 16 Apr:
Swiss chemist Dr. Albert Hofmann accidentally discovers the psychedelic properties of LSD.W I R E D DW |
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| 1954 | | 29 Sep:
The CERN Convention is entered into force.CERN SA |
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| 1960 | | 23 Jan:
The bathyscaphe Trieste takes the world\'s deepest dive into the Marianas Trench off the coast of Guam setting a record that stands for 40 years.NHHC EarthSky |
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| 1971 | | 4 Dec:
"Some stupid with a flare gun" during a Frank Zappa concert causes the Montreux Casino to burn down inspiring the music classic Smoke on the Water by Deep Purple.AO npr |
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| 1985 | | 19 Nov:
Mikail Gorbachov and Ronald Reagan meet for the first time.POLITICO USState |
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| 2005 | | 14 Jan:
The Huygens probe successfully lands on Saturn's largest moon Titan - the only landing to take place in the outer Solar System and the furthest from Earth.esa NASA |
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| 2015 | | 9 Mar:
The Solar Impulse 2, the first aircraft to fly day and night using energy from the sun, begins its round-the-world voyage.PHYS SPW |
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