Physicists have finally confirmed a phenomenon that sounds like pure science fiction: waves that appear to bounce off a sudden change in time rather than a surface in space. The effect, known as a ...

41P/Tuttle-Giacobini-Kresak is now known to be in the Jupiter family of comets, going from a little inside Jupiter's orbit to almost as far as Earth on its 5.4-year orbit. It is notable for its large ...

Marvel's latest superhero movie, "Doctor Strange," worked its magic on audiences over the weekend and led the box office. (SOUNDBITE OF FILM, "DOCTOR STRANGE") TILDA SWINTON: (As The Ancient One) ...