However, the findings of the new study, based on data from several Venus probes, leave zero chance of anything living in the clouds of Venus, he said. For water activity, which is measured on the scale from 0 to 1, the lowest survivable value is 0.585. The water activity level found in the molecules in the Venusian clouds was merely 0.004. Hallsworth added that the technique used to calculate the water activity could also help determine the habitability of exoplanets. “What excites me the most is that we can go down to the scale of water molecules for these distant planets and pinpoint their potential habitability,” Hallsworth said.