Scientists find 74-million-year-old mammal fossil in Chile

This photograph taken researcher by Hans Püschel, obtained from Universidad de Chile on August 11, 2025, shows Paleontologists working in the Río de la Chinas valley, in the Magallanes region of Chile, on February 19, 2023. Scientists have discovered the fossil of a tiny mouse-sized mammal that lived in the time of the dinosaurs in Chilean Patagonia. (Photo by Hans Püschel / Universidad de Chile / AFP)