News

  1. Life

    Rise of female weaponry driven by poop fights

    Motherly fights for excrement in one species of dung beetle have favored the evolution of a special female horn.

    By Susan Milius
  2. Health & Medicine

    Coffee not linked to heart arrhythmia

    A large survey of insured people finds no extra hospitalizations in java swillers.

    By Nathan Seppa
  3. Paleontology

    Ancient DNA suggests polar bears evolved recently

    A study of a rare Norwegian fossil narrows down when polar bears evolved and finds they are closely related to modern-day brown bears in Alaska.

    By Sid Perkins
  4. Archaeology

    Stone Age engraving traditions appear on ostrich eggshells

    Fragments indicate symbolic communication on 60,000-year-old water containers.