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 ...

Ticks are small bugs that are related to spiders and have been on the earth for at least 90 million years. There are more than 800 kinds of ticks across the globe, but only two tick families can give ...

Brood X contains billions — maybe trillions — of cicadas, and they are emerging after 17 years underground. They will shake up parts of the eastern United States during a raucous few weeks as ...

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 ...

The marbled salamander were considered locally extinct in the Boston area. Photo by Tigran Tadevosyan Since 2016, a group of conservationists have been releasing marbled salamanders in the Middlesex ...