There are two basic life-cycle patterns among animals. Many animals have complex life cycles with two or more very distinct stages; metamorphosis is the usual term for the often-radical changes that ...

Researchers uncover for the first time the mechanism that likely explains how embryos form either a larva or a miniature version of the adult. For over 100 years, biologists have wondered why animals ...

As spring gives way to summer, nature’s treasure chest awakens. Earth’s biological wealth sprouts, blooms and clamors. These contents once blanketed the landscape with a thin, life-sustaining fabric, ...

As spring gives way to summer, nature's treasure chest awakens. Earth's biological wealth sprouts, blooms and clamors. These contents once blanketed the landscape with a thin, life-sustaining fabric, ...