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 ...

From tadpole to frog caterpillar to butterfly and pup to wolf children will learn about the life cycles of animals the different stages of development and the average life spans of a variety of ...

Some biologists speculate that animals will get smaller with global warming to reduce heat stress. While this may be true of warm-blooded animals, what about exotherms like insects? Thanks to a ...

For over 100 years, biologists have wondered why animals display different types of life cycles. Some species, like us humans and most vertebrates, develop directly into a fully formed—yet ...