The freshwater fishes on this list are rare because they’re critically endangered and some may already be extinct in ... is a species of darter fish native to North America.

In addition to loss of habitat, invasive toads and hungry humans, a parasitic fungus called chytrid has taken a heavy toll on ...

Compared to when a Virginia Institute of Marine Science study tracking American shad and river herring returning ... A group of endangered bottom-dwelling fish called darters are also sensitive to ...

An SMU-led research team has found that ancient rocks and fossils from long-extinct marine reptiles in Angola clearly show a ...

It was part of Megalonyx, an extinct ground sloth, MacPhee said. Like Glyptodon, Megalonyx traveled to North America from South America. In fact, ground-sloth fossils indicate that these animals ...

We preselected all newsletters you had before unsubscribing.

Tens of millions of years ago, shortly after the dinosaurs went extinct, mammals grew to epic proportions, dwarfing the animals we see today. "There used to be cow-sized wombats in Australia, and ...

Kerin Claeson, professor of anatomy at Philadelphia College of Osteopathic Medicine in the US, said: “We have known for decades that these extinct salmon from Central Oregon were the largest to ...

Unfortunately, like a muscle that atrophies when not exercising, these declining rates of pen use have made this skill diminish to the point that experts fear it’s going to go extinct.

Overall, there’s been a steady resurgence in the number of American bison alive today, after they nearly went extinct in the 19th century due to overhunting and slaughtering practices.

Kerin Claeson, professor of anatomy at Philadelphia College of Osteopathic Medicine in the US, said: “We have known for decades that these extinct salmon from Central Oregon were the largest to ...