Uncategorized

  1. Health & Medicine

    Metal’s Mayhem: Cadmium mimics estrogen’s effects, thwarts DNA repair

    Cadmium causes endocrine disruption by mimicking estrogen in rats and also thwarts routine DNA repair, causing mutations, two studies show.

    By Nathan Seppa
  2. Materials Science

    Tiny Labs: Polymers on silicon chip catch, release proteins

    In a step toward a new laboratory-on-a-chip technology, researchers have grown a dense polymer film on a silicon wafer that takes up and releases proteins on command.

    By Jessica Gorman
  3. Animals

    City Song: Birds sing higher near urban traffic

    Birds in noisier city spots tend to sing at a higher pitch than do members of the same species in quieter neighborhoods.

    By Susan Milius
  4. Earth

    Protective Blanket: Atmosphere blocks many small stony asteroids

    A new computer model that more realistically simulates the aerodynamic forces on an object as it passes through Earth’s atmosphere suggests that the thin layer of air is an even better shield than previously thought.