Scientists and fishermen in Brazil caught an “armored” river creature known to sting and discovered a new species, a study said. Photo from Willian Massaharu Ohara via Tencatt, Ohara, Carvalho, and ...

Scientists found an “armored” creature with “copper”-colored teeth in mountain rivers of Brazil and discovered a new species, a study said. Photo from Uzeda, Paiola, Cesar, Okubo, Marques-Frisoni, ...

A 400-million-year-old jawed fish fossil found in the Arctic, Romundina gagnieri, could be a key link in the evolution of vertebrate teeth.

The summaries below were drafted with the help of AI tools and edited by journalists in our News division. All linked stories were reported, written and edited by McClatchy journalists. Unique ...

Scientists found an “armored” creature with a “tall” head in the Tocantins River and discovered a new species, a study said. Photo from Felipe Araújo In a river of northern Brazil, an “armored” ...

In a river of western Brazil, an “armored” creature with bumpy lips swam through the “dark tea-colored” waters. Something about it caught the attention of nearby scientists — and for good reason. It ...