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  1. Animals

    Separate Vacations: Birds winter apart but return in sync

    Mated pairs of black-tailed godwits may fly off to winter refuges a thousand kilometers apart but can still arrive back at their breeding site the next spring within a few days of each other.

    By Susan Milius
  2. Tech

    Dawn of the commercial space age

    On Oct. 4, a privately funded, piloted craft called SpaceShipOne reached a height of 378,000 feet (115.1 kilometers), breaking a world altitude record for rocket-powered planes and claiming the $10 million Ansari X prize.

    By Sid Perkins
  3. Astronomy

    Planet Signs? Sifting a dusty disk

    Infrared spectra of a disk of debris surrounding the young star Beta Pictoris reveals three distinct bands of dust, suggesting the location of a possible planet flanked by belts of asteroids or comets.