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  1. Paleontology

    Feathered fossil still stirs debate

    More than 2 years after scientists first described 120-million-year-old fossils of a feathered animal, a new analysis seems to bolster the view that the turkey-size species was a bird has-been and not a bird wanna-be.

    By Sid Perkins
  2. Tech

    Nanotechnologists get a squirt gun, almost

    A novel computer simulation of molecular behavior suggests that a minuscule squirt gun able to spit liquids a few hundred nanometers ought to work.

    By Peter Weiss

  3. Skin cells reveal they have hairy origins

    The outer layers of the skin may spring from cells in hair follicles.

    By John Travis

  4. 19236

    I have some questions regarding the statistics presented in this article.