Ancient sea organisms survived until a sudden extinction 550 million years ago, revealing what may be the first major mass extinction.

The number of Mexican gray wolves in Arizona and New Mexico grew to at least 319 in 2025, as the species inches closer to possible downlisting from endangered to threatened.

Researchers studying the soft-bodied Ediacaran biotas of the world generally accept that there are three distinct assemblages. The 575–560-million-year-old (Ma) Avalon Assemblage is best known from ...

Scientists used AI to analyze 10,631 freshwater fish species and found that stable, connected rivers are critical for ...

Neuroscientists identify a CRF-neuron "switch" in the brain's BNST region that, when activated, allows for significantly faster unlearning of fear responses.

Unlearning fear responses is a fundamental learning process in the brain. It allows us to flexibly react to formerly ...

Whether it's redfin pickerel in the Kennebec River or sturgeon in the Great Lakes, nearly one-third of freshwater fish species are facing possible extinction, threatening food supplies, ecosystems and ...

Another petition to list an important Northwest fish stock under the Endangered Species Act appears to have been shot down by the feds, making for three in the last two and a half months.

A new study focused on cryptic species—animals that look the same but are genetically different—found that they’re more widespread among vertebrates than we previously thought.

Scientists believe there are only a few hundred black-footed ferrets still living in the Western United States. The ...

(FOX40.COM) — Jerry Wagner is part of a nationwide network of volunteer pilots for Pilots ‘n Paws, a nonprofit that rescues animals in danger of euthanasia. Wagner got involved after a fellow aviator ...

A pair of naturalists spent weeks in the wilds of South Florida in the 1930s, braving alligators and snakes to find and photograph wetland and wading birds like the gangly wood stork. Unlike many of ...