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  1. Animals

    This killifish can go from egg to sex in two weeks

    The fastest known maturing vertebrate in the lab is even faster in the wild.

    By Susan Milius
  2. Astronomy

    Hopes dim that gamma rays can reveal dark matter

    A mysterious glow of gamma rays coming from the center of the Milky Way probably isn’t a sign of dark matter.

    By Emily Conover
  3. Genetics

    The first detailed map of red foxes’ DNA may reveal domestication secrets

    Thanks to a newly deciphered genome of red foxes, researchers have pinpointed regions in the animals’ DNA linked to taming them.

    By Tina Hesman Saey
  4. Physics

    Strange metals are even weirder than scientists thought

    Some strange metals are odd in more ways than one, and that could help scientists understand high-temperature superconductors.