Life cycles require the creation of an autonomous individual, that individual’s growth and that individual’s reproduction In ...

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 ...

Periodical cicadas have one of the strangest life cycles in the animal kingdom. The 17-year cicadas spend 99.5% of their lives underground in an undeveloped nymph state, which is the longest strictly ...

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, ...

The energy invested in animal reproduction is as much as 10 times greater than previously estimated when the metabolic load of bearing and caring for offspring is accounted for, according to a new ...