The Milky Way may be home to some 3,000 extraterrestrial civilizations but the vast distances between our galactic cousins will make contact extremely rare, a new study concludes.
If Professor Hubert Farnsworth's 'Smell-O-Scope' actually existed, astrobiologists would have pointed it at dozens of alien planets by now.
Telltale pollution could reveal ET, study shows
Project aims to drop penetrating darts into planet surface.
Humanity will probably have to wait a few decades to find out if life is common beyond our own solar system.
Could ET be chatting with colleagues or robots on sister planets in its solar system? Maybe so, say scientists who last year launched a new type of Search for Extraterrestrial Intelligence, or SETI, project to eavesdrop on aliens.
Moons in close binary solar systems have a better chance of hosting life than those in single-star systems, new research has shown.
Dr. Ian O'Neill, space producer for Discovery News, steps in to discuss some of the ways scientists are working to detect signs of life on other worlds.
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