They emerge from the ground every 13 or 17 years. — -- Another 17 years have passed for one brood of periodic cicadas -- the time has come for billions to emerge from the ground in deafening ...

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 ...

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 ...