When We Finally Find Aliens, They Might Smell Terrible – Scientific American Blog Network

Imagine for a moment that an alien astrophysicist on some distant but inhabited planet is trying to find out whether Earth is inhabited. If they were looking in the last 100 years, there would have been several unequivocal pieces of evidence: radio signals, television broadcasts, emissions of artificial chemicals such as chlorofluorocarbons, or CFCs. But […]

Read More When We Finally Find Aliens, They Might Smell Terrible – Scientific American Blog Network