Are We Alone? Scientific American

Here's the object of my question ☝️☝️ : r/philadelphia

Are we alone in the Universe?

File:Scientific American - Series 1 - Volume 004 - Issue 20.pdf - Wikimedia Commons

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Scientific American Volume 35 Number 03 (July 1876) . pendent on the ear alone for .the study of musical A-ibrations. They can be made apparent ito the eye. If we attach a

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