![When France switched to the meter in the 18th century, they placed 16 of these across Paris so that people would be able to tell exactly how long a meter is. : When France switched to the meter in the 18th century, they placed 16 of these across Paris so that people would be able to tell exactly how long a meter is. :](https://i.redd.it/wk337v6dg92z.jpg)
When France switched to the meter in the 18th century, they placed 16 of these across Paris so that people would be able to tell exactly how long a meter is. :
Ghazwan Butrous on Twitter: "Happy World #Metrology Day #onthisday to commemorate the signing of Treaty of the Meter) and the establishment of #BIPM #OTD #histsci https://t.co/gCfvZAHp9K" / Twitter
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Greenpeace - Demonstration in Berlin for Germany to Join the UN Treaty on the Prohibition of Nuclear Weapons
![The SeaCleaners | 50 kg of plastic per meter of coast in the world in 2040: from pollution to solution, the striking report of the United Nations Environment Program The SeaCleaners | 50 kg of plastic per meter of coast in the world in 2040: from pollution to solution, the striking report of the United Nations Environment Program](https://www.theseacleaners.org/wp-content/uploads/2021/12/from-pollution-to-solution-3.png)
The SeaCleaners | 50 kg of plastic per meter of coast in the world in 2040: from pollution to solution, the striking report of the United Nations Environment Program
![TREATY OF PEACE, GOOD CORRESPONDENCE & NEUTRALITY IN AMERICA, BETWEEN THE MOST SERENE AND MIGHTY PRINCE JAMES II...AND THE MOST SERENE AND MIGHTY PRINCE LEWIS XIV... | Treaty of Whitehall TREATY OF PEACE, GOOD CORRESPONDENCE & NEUTRALITY IN AMERICA, BETWEEN THE MOST SERENE AND MIGHTY PRINCE JAMES II...AND THE MOST SERENE AND MIGHTY PRINCE LEWIS XIV... | Treaty of Whitehall](https://www.williamreesecompany.com/pictures/medium/WRCAM55580.jpg)