A new approach in the search for extraterrestrial intelligence: targeting alien polluters
Wednesday, July 23, 2014 - 10:01
in Astronomy & Space
Humanity is on the threshold of being able to detect signs of alien life on other worlds. By studying exoplanet atmospheres, we can look for gases like oxygen and methane that only coexist if replenished by life. But those gases come from simple life forms like microbes. What about advanced civilizations? Would they leave any detectable signs?