toothed whales

  • Ancient, Sharp-Toothed Whales Are Upending Cetacean History

    Ancient, Sharp-Toothed Whales Are Upending Cetacean History

    All living whales are descended from terrestrial mammals, but how these aquatic creatures evolved into giant filter-feeders remains a biological mystery. New research shows that ancient whales had razor-sharp teeth similar to land-based carnivores — an observation that’s upsetting a prevailing idea that ancient whales used their teeth for filter feeding.