Uncategorized

  1. Health & Medicine

    Early Arrival: HIV came from Haiti to United States

    New analysis of 25-year-old blood samples indicates that HIV reached the United States in about 1969, 12 years before AIDS was first formally described.

    By Brian Vastag
  2. Math

    Math on Fire

    A supercomputer model fed by real-time data is beginning to make sense of the seemingly unpredictable movement of wildfires.

    By Julie Rehmeyer
  3. Paleontology

    Meet the old wolves, same as the new wolves

    The dire wolf, an extinct species preserved in abundance at the La Brea tar pits, seems to have had a social structure similar to that of its modern-day relatives.

    By Sid Perkins
  4. Paleontology

    Dinosaurs matured sexually while still growing

    Distinctive bone tissue in fossils of several dinosaur species suggests that the ancient reptiles became sexually mature long before they gained adult size.