Photo: Clelia Gasparini It's like The Hottie and The Nottie, fish-style! Italian researchers have discovered that a school of guppies can be quite as shallow and vain as popularity-obsessed...

How many fish does it take for g...  ...ith the startling number: just 1 female guppy . Dr. Deacon explained, “Us...  ...eacon explained how the finding might explain the guppy ’s success as an invasive specie...