Carl Sagan explains how the Ancient Greek knew the earth was round
Details
| Title | Carl Sagan explains how the Ancient Greek knew the earth was round |
| Author | carlsagandotcom |
| Duration | 0:52 |
| File Format | MP3 / MP4 |
| Original URL | https://youtube.com/watch?v=T0f6u39jlRA |
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Description
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