Hubble observations confirm planet birth theory People's Daily Online - The Hubble Space Telescope has provided definitive evidence for a long-predicted theory that planets form from debris disks around stars, astronomers said on Monday.

November 6, 2004 -- RHYTHMS OF LIFE: The Biological Clocks that Control the Dally Lives 'of Every Living Thing RUSSELL G. FOSTER AND LEON KREITZMAN HOW do birds know ...

Tropical Beginnings Science Now - By Dan Whipple. In the tropics, which wrap around swaths of nearly every continent, animal and plant diversity is abundant, and it declines as one moves toward the North and South poles.