Carl Sagan, along with co-author Edwin Salpeter, famously published a paper in the 70s about the possibility of finding life in the cloud of Jupiter. They specifically described sinkers, floaters, and hunters that could live floating and moving in the atmosphere of our solar systems largest planet. He also famously talked about how clouds on another of our solar systems planets - Venus - obfuscated what was on the surface, leading to wild speculation about a lush, Jurassic Park-like world full of life, just obscured by clouds. Venus turned out to be the exact opposite of that, but both of those papers show the impact clouds can have on the Earth for life. A new paper by authors as the Carl Sagan Institute, led by Ligia Coelho of Cornell, argues that we should look at clouds as potential habitats for life - we just have to know how to look for it.