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  1. Paleontology

    The last ice age wasn’t totally icy

    Radiocarbon dating of fossils taken from caves on islands along Alaska's southeastern coast suggest that at least a portion of the area remained ice-free during the last ice age.

    By Sid Perkins
  2. Paleontology

    Did ancient wildfire end in barbecue?

    Small pieces of large bones and petrified wood that show distinct signs of being burned may be evidence of a 74-million-year-old wildfire in central Wyoming.

    By Sid Perkins
  3. Health & Medicine

    Mutation linked to sinus infections

    People who have frequent sinus infections are more likely on average to carry one copy of the same genetic mutation that causes cystic fibrosis, even though they don't have that disease.