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  1. Astronomy

    This year’s neutron star collision unlocks cosmic mysteries

    A rare and long-awaited astronomical event united thousands of astronomers in a frenzy of observations.

    By Emily Conover
  2. Genetics

    CRISPR gene editing moved into new territory in 2017

    Scientists edited viable human embryos with CRISPR/Cas9 this year.

    By Tina Hesman Saey
  3. Climate

    The Larsen C ice shelf break has sparked groundbreaking research

    The hubbub over the iceberg that broke off Larsen C may have died down, but scientists are just getting warmed up to study the aftermath.

    By Carolyn Gramling
  4. Humans

    The story of humans’ origins got a revision in 2017

    Human evolution may have involved the gradual assembly of scattered skeletal traits, fossils of Homo naledi and other species show.