The Whale Sanctuary Project - The ancestors of whales, dolphins and porpoises (known overall as cetaceans) were land animals, known to scientists as archaeocetes, who went aquatic about 50 million years ago.
![Irish Whale and Dolphin Group on Twitter: "🐬Believe it or not the ancestors of whales, dolphins and porpoises once lived on land! Their closest living relative today is thought to be the Irish Whale and Dolphin Group on Twitter: "🐬Believe it or not the ancestors of whales, dolphins and porpoises once lived on land! Their closest living relative today is thought to be the](https://pbs.twimg.com/media/E-Md5ETXsAANY_O.jpg:large)
Irish Whale and Dolphin Group on Twitter: "🐬Believe it or not the ancestors of whales, dolphins and porpoises once lived on land! Their closest living relative today is thought to be the
![By: sepideh keshavarz. Pages Introduction1 What is dolphin?2 How fast do dolphin swim?3 What dolphin eat?4 How big the dolphin grow?5 Do dolphin have. - ppt download By: sepideh keshavarz. Pages Introduction1 What is dolphin?2 How fast do dolphin swim?3 What dolphin eat?4 How big the dolphin grow?5 Do dolphin have. - ppt download](https://images.slideplayer.com/18/6095476/slides/slide_3.jpg)
By: sepideh keshavarz. Pages Introduction1 What is dolphin?2 How fast do dolphin swim?3 What dolphin eat?4 How big the dolphin grow?5 Do dolphin have. - ppt download
![This ancient species discovery finally explains where river dolphins come from | Fossils | Earth Touch News This ancient species discovery finally explains where river dolphins come from | Fossils | Earth Touch News](https://www.earthtouchnews.com/media/1426241/3184863584_4116f8f050_b.jpg)