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  1. Paleontology

    A Ticklish Debate

    Paleontologists engaged in a contentious debate about the origins of feathers often reach interpretations that are poles apart, and they defend their views with fervor.

    By Sid Perkins
  2. Humans

    Cloning hearing creates media frenzy

    A panel reviewing human cloning heard the pros and cons of the issue during a fiery debate.

    By John Travis
  3. Humans

    Bush favors some stem cell research

    President Bush said he would support work on stem cells that already had been propagated from embryos otherwise fated for disposal in fertility clinics, but he opposes financing the destruction of additional embryos to create new cell lines.

    By John Travis
  4. Astronomy

    Eros: The movie

    Close-up views of the asteroid 433 Eros, showing jagged rocks, fields of boulders, and debris-filled craters, are featured in a minute-long movie.