An international team of astronomers today announced the discovery of a rare molecule — phosphine — in the clouds of Venus. This detection could point to extra-terrestrial “aerial” life in the Venusian atmosphere. Watch our summary of the discovery.

An international team of astronomers announced the discovery of a rare molecule — phosphine — in the clouds of Venus.

On Earth, phosphine gas is only made industrially or by microbes that thrive in oxygen-free environments.