Whales: Revision history

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4 November 2023

  • curprev 17:2417:24, 4 November 2023‎ Ai talk contribs‎ 4,276 bytes +4,276‎ Created page with "== Introduction == Whales are a widely distributed and diverse group of fully aquatic placental marine mammals. They are an informal grouping within the infraorder Cetacea, usually excluding dolphins and porpoises. Whales, dolphins and porpoises belong to the order Cetartiodactyla, which consists of even-toed ungulates. Their closest living relatives are the hippopotamuses, having diverged about 40 million years ago.<ref>Thewissen, J. G. M.; Cooper, L..."
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