Uncategorized

  1. Astronomy

    Two-faced star reveals a pulsar’s surprising bulk

    An ultramassive pulsar is frying its stellar companion so that the star shows two different temperatures.

    By Lisa Grossman
  2. Genetics

    Guidelines call for limits to whole genome testing for fetuses

    Powerful tests offer unprecedented detail about fetal genomes. But whole-genome tests aren’t ready for widespread use yet, doctors caution.

    By Laura Sanders
  3. Animals

    The first land-walking vertebrates may have emerged from salty estuaries

    Early tetrapods were transitional creatures — not only between land and water, but also between fresh and salty environments.

    By Carolyn Gramling
  4. Paleontology

    Oldest known lizard fossil pushes group’s origins back 75 million years

    CT scan reveals hidden identity of an unusual lizard fossil found years ago in the Italian Alps.