We may not have yet found definitive proof of the existence of aliens in our universe, but clues about how life spreads through the cosmos may be hiding in plain sight.
Astrophysicists have developed a computer model to spot the patterns and clusters that these 'seeds of life' would form if they were moving between planets.
They compare its 'relentless spread' to an epidemic on Earth and believe this can not only be used to detect the signatures of alien life, we could be tracking this spread within the next generation.
The research was led by Henry Lin from the Harvard-Smithsonian Center for Astrophysics (CfA) and it was based on panspermia.
Panspermia is a theory that suggests life spreads across the universe, hitchhiking on comets or meteorites.http://www.dailymail.co.uk/sciencetech/article-3227748/Are-aliens-spreading-universe-like-EPIDEMIC-Astronomers-say-extraterrestrial-life-form-patterns-spotted-Earth.html