2012年9月1日 · Origin and early evolution of whales in geological time and environmental context. The times of major transition during the early. Mosaic pattern of change in anatomical, physiological, and...

Increased evidence on whale evolution shows that modern whales diverged from ancient forms around 34 million years ago, with whale diversity peaking during the Miocene Epoch, 23 to 5 million years ago, and then decreasing until now.

Early ancestors of the ocean's biggest animals once walked on land. 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 ancestors lived about 50 million years ago.

2009年4月16日 · We review raoellid artiodactyls, as well as the earliest families of cetaceans: pakicetids, ambulocetids, remingtonocetids, protocetids, and basilosaurids. We focus on the evolution of cetacean organ systems, as these document the …

From land to water: The origin of whales, dolphins, and porpoises. Evolution: Education & Outreach 2:272-288. Compared to other early whales, like Indohyus and Pakicetus, Ambulocetus looks like it lived a more aquatic lifestyle. Its legs are …

2025年1月1日 · Whales and dolphins belong to the order Cetacea, the marine mammals. Most amazingly, their ancestors once lived on land before they gradually adapted to living in water over millions of years.

2022年11月26日 · Whales and their kin evolved from land-dwelling mammals, a transition that entailed major physiological and morphological changes—which geneticists have begun to parse.

5 天之前 · Discover the incredible journey of whale evolution, from land-dwelling mammals to the giants of the sea. Learn about key adaptations, transitional forms, and the future of whale conservation.

2024年5月13日 · Millions of years ago, whales weren't ocean giants, but land dwellers. In fact, their closest living relative is the hippopotamus, hinting at their remarkable transformation over time. This AnimalWised article explores the incredible evolutionary journey of whales and how they transitioned from land to the ocean giants we know today.

evolved from a terrestrial ancestor. We further suggested that whales made a gradual transition from land to sea in the early Eocene, spend-ing progressively more time feeding on planktivorous fi shes in shallow, highly productive embayments associated with closure of the ancient eastern Tethys Sea as the Indian Subcontinent became a part of Asia