(Reuters) - Scientists in Australia have unearthed beautifully preserved fossilized hearts and other internal organs of ancient armored fish in a discovery that provides insight into the evolution of ...

In the limestone ranges of Western Australia’s Kimberley region, near the town of Fitzroy Crossing, you’ll find one of the world’s best-preserved ancient reef complexes. Here lie the remnants of ...

Researchers have unearthed a 380-million-year-old heart from a prehistoric fish—the oldest three-dimensionally preserved heart from a vertebrate ever found. They published their findings in the ...

Tiktaalik, the 375-million-year-old fish fossil, is best known for its anatomy suggesting it may have walked out of the water and is also a very popular meme. Sung to the tune of The Killers’ Mr.

Giving birth to live young is thought to mainly occur in mammals and sharks, but a new study suggests that it was once a common mechanism for reproduction. A large group of ancient fish carried its ...