Notes from my research:1. After returning from a trip to Egypt, Aristotle noted that “there are stars seen in Egypt and…Cyprus which are not seen in the northerly regions.” This phenomenon can only be explained if humans were viewing the stars from a round surface. Aristotle continued and claimed that the sphere of the Earth is “of no great size, for otherwise the effect of so slight a change of place would not be quickly apparent.” (De caelo, 298a2-10) http://www.popsci.com/10-ways-you-can-prove-earth-is-round?scrlybrkr 2. Imagine the Sun's rays (represented by yellow lines) hitting two sticks (white lines) some distance apart. If the Earth were flat, the resulting shadows would be the same length, no matter how far apart you place the sticks. http://www.popsci.com/10-ways-you-can-prove-earth-is-round?scrlybrkr 3. Standing in a flat plateau, you look ahead of you towards the horizon. You strain your eyes, then take out your favorite binoculars and stare through them, as far as your eyes (with the help of the binocular lenses) can see. Your friend was running across it, you would eventually see him/her dissapeering! http://www.popsci.com/10-ways-you-can-prove-earth-is-round?scrlybrkr 4. The moon would not have curved shadows if it were flat. https://www.youtube.com/watch?v=d3GD9gXzUBk | Notes from videos:
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