Uncategorized

  1. Paleontology

    Fertile Ground: Snippets of DNA persist in soil for millennia

    Minuscule samples of sediment from New Zealand and Siberia have yielded bits of DNA from dozens of animals and plants, including the oldest DNA sequences yet found that can be traced to a specific organism.

    By Sid Perkins
  2. Materials Science

    Between the Sheets: In reactors and nanotubes, errant atoms get a grip

    A new computer simulation predicts that neutron irradiation of graphite displaces atoms and bonds in unexpected ways.

    By Peter Weiss
  3. Materials Science

    Invent by Number: Researchers predict, then produce superior titanium alloys

    Researchers have developed a new method or making titanium-based alloys with many qualities far superior to those in any alloy previously known.