While it’s far too soon to claim that life has been discovered beyond our planet, a new scientific discovery provides a tantalizing clue that Venus may be the best place to search for extraterrestrial life. The Royal Astronomical Society announced today that phosphine molecules have been observed from Earth in the atmosphere of Venus.

Why does that matter? The phosphine molecule is created either artificially on Earth or “by microbes that thrive in oxygen-free environments,” as RAS describes.

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