Yahoo Web Search

Sign In

Search results

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

    Apr 16, 2009 · 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. The transition from land to water is documented by a series of intermediate fossils, many of ...

    • J. G. M. Thewissen, Lisa Noelle Cooper, Lisa Noelle Cooper, John C. George, Sunil Bajpai
    • 2009

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

    By Katie Pavid. 644. 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.

  3. People also ask

  4. evolution.berkeley.edu › what-are-evograms › theThe evolution of whales - Understanding Evolution

    Hippos likely evolved from a group of anthracotheres about 15 million years ago, the first whales evolved over 50 million years ago, and the ancestors of both these groups were terrestrial. These first whales, such as Pakicetus, were typical land animals. They had long skulls and large teeth that could be used for eating meat.

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

    May 21, 2007 · Desmostylians represent an extinct order of semiaquatic herbivorous mammals, known only from the Oligocene and Miocene marginal marine deposits of the north Pacific (Domning et al., 1986). For such a small group of mammals (six currently recognized genera), there has been a great deal of debate about their lifestyle and their relationship to ...

    • Mark D. Uhen
    • 2007

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

    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 ...

    • Mark D. Uhen
    • muhen@gmu.edu
    • 2013

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

    The return to the sea: The evolution of marine mammals. : : : 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! Each lineage shows shared as well as unique evolutionary solutions to the challenges of ...

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

    Mar 21, 2012 · When did scientists first propose that marine mammals evolved from land-living mammals? What findings led to this conclusion?

  1. Searches related to when did the first marine mammals evolve into dogs in order to survive

    when did the first marine mammals evolve into dogs in order to survive and growwhen did the first marine mammals evolve into dogs in order to survive and produce
    when did the first marine mammals evolve into dogs in order to survive heatwhen did the first marine mammals evolve into dogs in order to survive cold
    when did the first marine mammals evolve into dogs in order to survive and livewhen did the first marine mammals evolve into dogs in order to survive and kill
    when did the first marine mammals evolve into dogs in order to survive foodwhen did the first marine mammals evolve into dogs in order to survive and maintain
  2. People also search for