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   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 marine mammals go back to the sea?

   • Nature 413:277–281 Uhen MD (2007) Evolution of marine mammals: back to the sea after 300 million years. Anat Rec 290:514–22

   Return to the Sea: The Evolution of Marine Mammals

   link.springer.com/chapter/10.1007/978-3-319-98280-9_2

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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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   How long did it take a whale to evolve?

   • Cetacean Evolution. Graphic by Karen Brazell. The earliest whales that we think were fully aquatic, that is, they never left the water, are found around 40 million years ago, during the middle Eocene. That means that the transition from terrestrial animals to fully aquatic animals took about 12 million years.

   Ocean Giants | Going Aquatic: Cetacean Evolution - PBS

   www.pbs.org/wnet/nature/ocean-giants-going-aquatic-cetacean-evolution/7577/

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2. 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.

3. 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 · We focus on the evolution of cetacean organ systems, as these document the transition from land to water in detail. Cetaceans (whales, dolphins, and porpoises) are an order of mammals that originated about 50 million years ago in the Eocene epoch.

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

   • Publish Year: 2009

4. www.smithsonianmag.com › smithsonian-institutionTake a Deep Dive Into The Reasons Land Animals Moved to the ...

   www.smithsonianmag.com › smithsonian-institution

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   Apr 16, 2015 · The movement of animals from the land into the sea has happened several times over the last 250 million years, and it has been documented in many different and singular ways.

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6. www.pbs.org › wnet › natureOcean Giants | Going Aquatic: Cetacean Evolution - PBS

   www.pbs.org › wnet › nature

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   Mar 21, 2012 · How long did it take for this land mammal to morph into the whales and dolphins we are familiar with today? What were some of the key adaptations that took place and do we know the order...

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

   ucmp.berkeley.edu › about › shortcourses

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   Terrie Williams, Professor of Ecology & Evolutionary Biology, UC Santa Cruz, and Director of the Marine Mammal Physiology Project, Long Marine Lab It has taken 50 million years for cetaceans and pinnipeds to evolve into the largest, most efficient predators in the oceans.

8. link.springer.com › chapter › 10Return to the Sea: The Evolution of Marine Mammals

   link.springer.com › chapter › 10

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   Nov 15, 2019 · Marine Mammals. Randall W. Davis. Abstract. Early Cetacea are classified as Archaeoceti (six families), and their fossils reveal the morphological and functional evolution of early, terrestrial Artiodactyla to fully aquatic Cetacea over 15 million years during the Eocene (~52 Mya).