Prehistoric Planet on Instagram: "Pakicetus evolved into whales through a long process of adaptation, beginning as a dog-sized, four-legged land mammal that lived near freshwater 50 million years ago. 🐋 Key evolutionary steps included the development of special ear bones for underwater hearing, increased time spent in water, and changes to limbs, nostrils, and the spinal column. These gradual transformations, seen in subsequent ancestors like Ambulocetus and Dorudon, ultimately led to the fully

Fossils