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A partial lunar eclipse. The round shape of the shadow demonstrates that the earth is round. An introduction to astronomy. 1868.
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![Tumblr media](https://64.media.tumblr.com/5e054e0fd93b63253927ca40140942ab/tumblr_ney6ddxOHe1qz62xqo1_540.jpg)
{ your eyes are burning holes through me }
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