News

  1. Archaeology

    Stone-tool makers reached North Africa and Arabia surprisingly early

    Ancient Homo species spread advances in toolmaking far beyond East Africa.

    By Bruce Bower
  2. Astronomy

    Astronomers have measured all the starlight ever emitted

    Astronomers used distant blazars to tally up all the stray photons roaming through space.

    By Lisa Grossman
  3. Health & Medicine

    Kids born in August are diagnosed with ADHD more than kids born in September

    August-born kids have higher rates of ADHD diagnosis than kids born in September in U.S. states with a September 1 cutoff for starting kindergarten.

    By Aimee Cunningham
  4. Genetics

    The researcher who created CRISPR twins defends his work but fails to quell controversy

    After getting a glimpse of data behind the birth of the first gene-edited babies, many scientists question the study’s ethics and medical necessity.