Uncategorized

  1. Humans

    Human embryo replicas have gotten more complex. Here’s what you need to know

    Lab-engineered human embryo models created from stem cells provide a look at development beyond the first week. But they raise ethical questions.

    By Tina Hesman Saey
  2. Archaeology

    How an ancient solar flare illuminated the start of the Viking Age

    Improved radiocarbon dating aided by a solar flare in the year 775 sheds light on the early days of Vikings and global trading in medieval times.

    By Martin J. Kernan
  3. Planetary Science

    NASA’s DART mission lofted a swarm of boulders into space

    Hubble telescope images of the asteroid Dimorphos reveal a halo of 37 dim, newfound objects — most likely boulders shaken loose from the surface.