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Carl Sagan - Cosmos - Eratosthenes
There should be some description not just a link to the Eratosthenes-Site, where you have to register again. A download PDF would have been nice...
Best greetings from cloudy Vienna at 7.8°C to wonderful Athens,
ODS school network will perform the Eratosthenes Experiment in March 2014. Stay tuned! Here is the relevant site: http://ea.gr/ep/eratosthenes/
Have a look also to this inquiry based activity from Open Science Resources portal: http://www.osrportal.eu/connect.php?m=thenewviewer&nid=94354
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