Dolphins and orcas belong to the group of cetaceans, which includes whales and porpoises. All cetaceans are descended from ...

The evolution of modern cetaceans (including whales, dolphins, and porpoises) from terrestrial ancestors required many drastic anatomical, physiological, and behavioral changes. The development of an ...

By studying fossils of whales, the team uncovered clues about the evolution of cetaceans--whales, dolphins and porpoises--and how and when they became such agile sea creatures.

References [1] How Whales Dive, Feast, and Fast: The Ecophysiological Drivers and Limits of Foraging in the Evolution of Cetaceans. Annual Review of Ecology Evolution and Systematics (2023).