Sept 15 (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 ...

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.

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 ...