Astronomers have found something very weird and very unexpected in the clouds of the planet, Venus. They found a chemical present that usually is associated with biological life. Does this mean there's life on Venus? Nope, far from it, but it's still kinda shocking. In their paper in Nature Astronomy, scientists say they were surprised to discover a detectable amount of the chemical phosphine. The gas is also found on Earth, where its only known source is living things. But scientists acknowledge there might be an unknown explanation for the gas on Venus, one that has nothing to do with living creatures or organisms. Still, "This is an astonishing and 'out of the blue' finding," says Sara Seager of MIT, one of the researchers. "It will definitely fuel more research into the possibilities for life in Venus' atmosphere."