The Polish Geological Institute-National Research Institute reports a Lower Devonian (419 to 393 million years ago) fossilized trackway in the Holy Cross Mountains, Poland, attributed to dipnoan fish.

If you would ask a regular person, do you think fish can climb falls, most of them will tell you: you are crazy.” ...

Parakneria thysi are particularly vulnerable to extinction, especially in the face of human activities such as overfishing.

Anna's Hummingbird is one of many species shifting its range north and its breeding earlier in the year. (Photo credit: Will Sweet) As global temperatures rise, many species are scrambling to adapt–or ...

Learn how fish in the Democratic Republic of the Congo scale a near-vertical waterfall using microscopic hooks.

The ongoing global climate crisis is characterized by rising mean water temperatures, thermal stress, ocean acidification, and fluctuating dissolved oxygen ...