How to Measure the Earth's Radius
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physics almanacal birunihow to measure earths radiusradius earthearth circumferenceeratosthenesgolden age islamarab golden agepolymathphysicsphysics coursephysics helpearth sizediametergeophysicsearth sciencehome experimentphysics explainedphysics girlgeometryscience historyancient scienceabu rayhanastronomyal khwarezmial tusial haythamalhazenalgorithmround earthflat earthmuslim scienceal khaliliearth measurements
