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1. anatomypubs.onlinelibrary.wiley.com › doi › fullEvolution of marine mammals: Back to the sea after 300 million...

   anatomypubs.onlinelibrary.wiley.com › doi › full

   May 21, 2007 · Evolution of marine mammals: Back to the sea after 300 million years. Mark D. Uhen. First published: 21 May 2007. https://doi.org/10.1002/ar.20545. Citations: 144. Sections. PDF. Tools. Share. Abstract. The fossil record demonstrates that mammals re-entered the marine realm on at least seven separate occasions.

   • Author: Mark D. Uhen

   • Publish Year: 2007

2. evolution-outreach.biomedcentral.com › articles › 10From Land to Water: the Origin of Whales, Dolphins, and ...

   evolution-outreach.biomedcentral.com › articles › 10

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   Apr 16, 2009 · Abstract. Cetaceans (whales, dolphins, and porpoises) are an order of mammals that originated about 50 million years ago in the Eocene epoch. Even though all modern cetaceans are obligate aquatic mammals, early cetaceans were amphibious, and their ancestors were terrestrial artiodactyls, similar to small deer.

   • Author: J. G. M. Thewissen, Lisa Noelle Cooper, Lisa Noelle Cooper, John C. George, Sunil Bajpai

   • Publish Year: 2009

3. People also ask

   How long did it take for marine mammals to evolve?

   • We are working with Nick to develop a full website on the evolution of marine mammals — we'll keep you posted! It has taken 50 million years for cetaceans and pinnipeds to evolve into the largest, most efficient predators in the oceans.

   The return to the sea: The evolution of marine mammals

   ucmp.berkeley.edu/about/shortcourses/shortcourse11.php

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   When did mammalian evolution start?

   • This is no great surprise, because a great deal of mammalian evolution has been linked to changes in feeding ecology. It is also interesting to note that the clades of marine mammals seem to have originated at two discrete times, Cetacea and Sirenia during the early Eocene, and Desmostylia and Pinnipedia during the Oligocene.

   Evolution of marine mammals: Back to the sea after 300 million years

   anatomypubs.onlinelibrary.wiley.com/doi/full/10.1002/ar.20545

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   Do marine mammals have evolutionary histories?

   • Before comparing the evolutionary histories of each of the clades of marine mammals, it is worth emphasizing that the evolutionary histories outlined here are only the most basic and superficial sketches of the morphological changes that these groups have undergone.

   Evolution of marine mammals: Back to the sea after 300 million years

   anatomypubs.onlinelibrary.wiley.com/doi/full/10.1002/ar.20545

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   How long did it take a whale to evolve?

   • It also gave birth to its young underwater. Within 10 million years, from the age of Pakicetus to Dorudon, cetaceans had completely adapted to life in the water. That sounds like a long time, but in evolutionary terms this is considerably fast. The descendants of Dorudon went on to evolve into modern whales.

   When whales walked on four legs | Natural History Museum

   www.nhm.ac.uk/discover/when-whales-walked-on-four-legs.html

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4. ocean.si.edu › through-time › ocean-through-timeOcean Through Time | Smithsonian Ocean

   ocean.si.edu › through-time › ocean-through-time

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   The K/Pg extinction cleared the way for new lineages of life to thrive. The mammals, once small and rodent-like, took advantage of the dinosaurs’ extinction and evolved in new directions, with some lineages eventually giving rise to the whales, seals, and manatees that live in the ocean today.

5. link.springer.com › article › 10A Brief History of Marine Mammals | Journal of Mammalian ...

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   Oct 18, 2012 · University of California Press, Berkeley, CA. 2012. 205 pp., $49.95 (cloth), $25.62 (Kindle). ISBN 9780520270572. Annalisa Berta leads readers through a vast range of topics regarding the evolution of marine mammals in Return to the Sea: The Life and Evolutionary Times of Marine Mammals. In this volume geared towards non-specialists (one might ...

   • Author: Mark D. Uhen
   • Email: muhen@gmu.edu

   • Publish Year: 2013

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7. www.nhm.ac.uk › discover › when-whales-walked-onWhen whales walked on four legs | Natural History Museum

   www.nhm.ac.uk › discover › when-whales-walked-on

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   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. Meet Pakicetus, a goat-sized, four-legged creature that scientists recognise as one of the first cetaceans (the group of marine animals that includes ...

8. www.ncbi.nlm.nih.gov › pmc › articlesA decade of progress in marine evolutionary biology - PMC

   www.ncbi.nlm.nih.gov › pmc › articles

   Dec 25, 2022 · Perspective/review pieces include reflections on the development of Marine Evolutionary Biology research as a whole (Johannesson et al., 2022), as well as detailed considerations of marine evo‐devo research (Stracke & Hejnol, 2022), on divergence and speciation in the sea (De Jode et al., 2022), and on human‐mediated evolution (Touchard et ...

9. ucmp.berkeley.edu › about › shortcoursesThe return to the sea: The evolution of marine mammals

   ucmp.berkeley.edu › about › shortcourses

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   Both morphological and molecular data tell us that the ancestors of the marine mammals were terrestrial, and that their various marine lifestyles have evolved independently at least seven times!