Life not totally unlike that on the earth may therefore exist upon this planet [Mars] for anything that we know to the contrary.
Side-Lights on Astronomy and Kindred Fields of Popular Science, Chapter VII (p. 131), Harper & Brothers Publishers. 1906
![Life not totally unlike that on the earth may therefore exist upon this planet [Mars] for anything that we know to the contrary.](https://img.libquotes.com/pic-quotes/v1/simon-newcomb-quote-lbm4f0i.jpg)
![Life not totally unlike that on the earth may therefore exist upon this planet [Mars] for anything that we know to the contrary.](https://img.libquotes.com/pic-quotes/v2/simon-newcomb-quote-lbm4f0i.jpg)
![Life not totally unlike that on the earth may therefore exist upon this planet [Mars] for anything that we know to the contrary.](https://img.libquotes.com/pic-quotes/v3/simon-newcomb-quote-lbm4f0i.jpg)
![Life not totally unlike that on the earth may therefore exist upon this planet [Mars] for anything that we know to the contrary.](https://img.libquotes.com/pic-quotes/v4/simon-newcomb-quote-lbm4f0i.jpg)
