Follow their extraordinary journey from shore to sea. Although whales are expert swimmers and perfectly adapted to life underwater, these marine mammals once walked on four legs. Their land-dwelling ...

PBS Nova explained how a small, furry prehistoric four-legged, semi-aquatic carnivore called the Pakicetus was a direct ...

This figure shows the bones of Peregocetus, including the mandible with teeth, scapula, vertebrae, sternum elements, pelvis, and fore- and hind limbs. Disclaimer: AAAS and EurekAlert! are not ...

But whales took all that effort and threw it out the window. From 50 to 40 million years ago they traded in their four legs for flippers. In fact, some whales today still have leftover bones of ...

The very first “whales” were land animals that walked on four legs — small deer-like creatures, about the size of a house cat, that ate plants and waded around in prehistoric lagoons over 50 ...