News

  1. Space

    Stellar winds hint at how planetary nebulae get their stunning shapes

    Observations of red giant stars reveal that planets or even other stars may influence the shape of a nebula’s cloud of dust and gas.

    By Curtis Segarra
  2. Planetary Science

    Rosetta data reveal an invisible ultraviolet aurora around comet 67P

    Solar wind electrons smash water molecules in the comet’s coma to make the 67P/Churyumov-Gerasimenko’s version of the northern lights.

    By Maria Temming
  3. Animals

    A tiny crustacean fossil contains roughly 100-million-year-old giant sperm

    Giant sperm preserved in an ancient ostracod may be the oldest known sperm fossil, showing that giant sperm have existed at least 100 million years.