An article published in the journal “Current Biology” reports the discovery of the fossils of a quadruped whale in sea sediments near the coast of Peru, dated about 42.6 million years ago. A team of researchers named this new species Peregocetus pacificus, probably the oldest found in the Americas. The uncovered skeleton constitutes the first indisputable finding of fossils of amphibian cetaceans that could move on land and swim in sea waters.