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  1. Astronomy

    Ancient spiral galaxy is 11 billion years old

    The most ancient spiral galaxy seen to date is 11 billion years old and could help reveal how galaxies sprout arms.

    By Lisa Grossman
  2. Health & Medicine

    New blood pressure guidelines put half of U.S. adults in unhealthy range

    New hypertension guidelines broaden the range of those considered to have high blood pressure and emphasize lifestyle changes to combat the condition.

    By Aimee Cunningham
  3. Animals

    The Lord Howe stick insect is officially back from the dead

    New genomic sequencing confirms that stick insects discovered near Lord Howe Island are the assumed-extinct Lord Howe stick insect.

    By Mariah Quintanilla
  4. Health & Medicine

    Cholera pandemics are fueled by globe-trotting bacterial strains

    International cholera strains, rather than local ones, have caused raging epidemics, according to research that examined the bacteria’s DNA.