Human contact with alien civilizations may be more likely than we think. A recent NASA study estimated that there should be at least four habitable planets (and probably more) within about 32 light years of Earth—a cosmic stone’s throw away. Those planets could just now be receiving (albeit faintly) our television broadcasts of the 1989 inauguration of President George H.W. Bush. But would aliens understand those broadcasts? Would we understand aliens? Could we ever interpret their languages?