News

  1. Paleontology

    Reptilian Repast: Ancient mammals preyed on young dinosaurs

    Two nearly complete sets of fossilized remains from 130-million-year-old rocks are revealing fresh details about the size and dietary habits of ancient mammals, hinting that some of these creatures were large enough to feast on small dinosaurs.

    By Sid Perkins
  2. Math

    When Laziness Pays: Math explains how cooperation and cheating evolve

    Researchers have developed a mathematical model that helps explain how cooperation and cheating evolve among simple organisms.

    By Erica Klarreich
  3. Astronomy

    Ultimate Retro: Modern echoes of the early universe

    Two teams of astronomers have for the first time detected the surviving notes of a cosmic symphony created just after the Big Bang, when the universe was a foggy soup of matter and radiation.