De extreem rechtse groep “Rechts in Verzet” komt vrijdag 31 juli (na
eerder al enkele beledigende spandoeken en posters te hebben opgehangen)
midden in het centrum van Zaandam hun haatdragend boodschap uiten.
Gaan we dat accepteren?
Rechts in Verzet is een ongure club die een grote mate van haat
jegens moslims, vluchtelingen en linkse mensen laat zien. Ontstaan uit
Pegida, heeft deze actiegroep onder andere een onthoofde pop geplaatst
bij een moskee, posters opgehangen met de tekst ‘‘hand in hand, terug
naar eigen land’’ en opgeroepen om de Islam te stoppen.
Dit gedachtengoed past niet in een vrij en multicultureel Zaanstad!
Wij roepen dan ook op om massaal op 31 juli om 13.00 naar de Rozengracht
te komen in Zaandam. Overstem ze, zorg ervoor dat iedereen weet dat we
in Zaandam ruimte hebben voor iedereen, behalve voor racisten en
fascisten!
Laat je horen!
Voor een inclusieve en solidaire samenleving, weg met racisme en fascisme!
bipch erastosthenes schooled b.o.b. 2,230 years ago
Ok so this is cool but I always wondered how they knew the shadows were different at the same instant. I mean it is not like they had phones. How did they sync up that instant. I feel like that would be interesting to know but no one ever says.
^^^Does anybody know this one? How, that far apart, the time at which the shadows were observed was synced up? I am genuinely curious, not a goddamn moron asking a gotcha question. High/Low tide? (I live in the middle of the country I do not know for the precise habits of tidal activity.) The appearance of a star (or planet) in the sky? Something as utterly mundane as sunrise?
Well, first of all, it wasn’t actually pillars! Eratosthenes was told about a well in Syene that, in the summer solstice every year (June 21st) would be illuminated at the bottom entirely and without any cast shadows. This indicated that the sun was directly overhead. Going off that well known curiosity and an intelligent hunch, our dude Eratosthenes waited until high noon of the summer solstice to measure the angle of a shadow cast by a stick in Alexandria. (Sidenote: Eratosthenes was a librarian of the infamous Library of Alexandria.)
His next course of action was to hire bematists, surveyors of the time whose professional specialty was to measure distance by walking with equal length steps. They measured a distance between Alexandria and Syene of about 5000 stadia. (Guess where the word stadium comes from.) Once he had that measurement, Eratosthenes did his math-y thing, and there you have it.
ANSWER EVEN COOLER THAN I HOPED!!
Eratosthenes’ work was thorough enough that by the time he finished revising his calculations, he ended up only 66 km off of the actual polar circumference of the Earth, or an error margin of 0.16%. [wiki]
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