Dec. 16 (UPI) --More than 16,600 footprints left by carnivorous dinosaurs of different sizes that walked, ran and even swam about 66 million years ago have been identified at the Carreras Pampa site ...

For a long time, the idea of giant animals has mostly been tied to dinosaurs on land. Oceans feel different, quieter, even though they hide their own deep history. Fossils occasionally hint at ...