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There are special days, special places , when and where the sun casts no shadow at noon. This was the first Eratosthenes experiment between Alexandria and Aswan, 2200 years ago.
There are special days, special places , when and where the sun casts no shadow at noon. This was the first Eratosthenes experiment between Alexandria and Aswan, 2200 years ago.
4 continents, 13 countries, 30 schools, 70 measurements
Amazing videoconference for the Eratosthenes workshop of Open Mathematics in Ben Arous (Tunisia). All the measures were made just before the videoconference and we had a live calculation of the circumference of the Earth with partners from Europe, Africa, Asia and America
8 schools from Greece, Italy, France and India observed the Mercury transit
April newsletter with results by continent and countries, With table of results, photo, and geometric figures
3 continents, 9 countries, 27 schools, 65 measurements
20 schools from Asia, Africa, Europe and South America participated to the videoconference
March newsletter with results by continent and countries,

With table of results, photo, and geometric figures

4 continents, 14 countries, 48 schools, 124 measurements

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La main à la pâte Stiftung Sonnentaler