NASA/JPL-Caltech/T. Pyle IN BRIEF Researchers from the University of Antioquia in Columbia proposed a new explanation for the weird light behavior of the so-called “Alien Megastructure” star. It seems a ringed-exoplanet the size of Neptune might be the cause. IRREGULAR DIPS A team of scientists led by Mario Sucerquia at the University of Antioquia (UdeA) in Colombia have …