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Jupiter May Have Destroyed The Solar System's First Planets

It is becoming increasingly obvious that our Solar System — with its inner collection of small rocky planets and an outer region buffeted by gas planets — is quite uncommon. According to a remarkable new study, the reason may have to do with Jupiter and an ancient migratory journey that kickstarted the destruction of… »3/24/15 8:00am3/24/15 8:00am

Experts Gather To Discuss Whether We Should Send Messages To Aliens

This coming weekend at the annual meeting of the American Association for the Advancement of Science, experts will be discussing the potential benefits and risks of a SETI scheme in which messages about Earth — including the entire contents of Wikipedia — would be transmitted to hundreds of star systems. »2/09/15 8:40am2/09/15 8:40am

Freakishly Old System Of Planets Hint At Ancient Alien Civilizations

Kepler scientists have discovered the oldest known system of rocky, Earth-sized planets in the Milky Way. This suggests that terrestrial planets have appeared throughout most of the Universe's 13.8 billion year history — a potential indication of just how ancient some extraterrestrial civilizations could be. »1/27/15 8:00am1/27/15 8:00am