Hunting for life on other planets is hard; it’s like trying to spot an ant on the other end of a football field. The closest potential host, Venus, is 25 million miles away. Beyond our Solar System, exoplanets that have piqued astronomers’ interest are light-years away. To search for life from these sizable distances, scientists look for biosignatures: elements, molecules, or substances that might have been made by life. These include oxygen and methane, among other compounds. But there’s... Read this story
