Dolphins and whales separately evolved the same speedy swimming bones

A 24-million-year-old fossil of a giant tusked dolphin lacks several features common to modern dolphins and baleen whales. The discovery shows that the common ancestor of dolphins and whales lacked these features, meaning the same adaptations for swimming must have evolved independently in both lineages. >> read more … image credits: By PaleoGeekSquared – Own … Meer lezen

New fossil seal species rewrites history

The discovery, published today in the Proceedings of the Royal Society B, radically changes scientists’ understanding of how seal species evolved around the world. >> read more …

The A-Z of Extinct Whales

In this episode, we’ll be travelling back more than 53 million years to go through the ABC’s of Extinct Whales. From Acrophyseter to Zygophyseter, it’s going to be one HELL of a ride! Join palaeontologist Ben Francischelli, as he gives you the scoop on these ancient cetaceans!

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The Baleen Whale with Teeth

Baleen whales are characterized by large keratinous racks in the upper palate (baleen) they use to scoop up millions of prey every day! But 25 million years ago, off the coast of southern Australia, a bizarre group of toothed baleen whales existed.

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An extinct large dolphin was a lot more like a killer whale

Now researchers have confirmed that an historical dolphin that lived throughout the Oligocene Epoch — 33.9 million to 23 million many years in the past — was the to start with cetacean (a kind of mammal) making use of echolocation to navigate underwater and fill the position of apex predator, a great deal like the recent-working day killer whale.

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Why manatees are related to elephants, and whales are related to deer

Animals that resemble each other may not be closely related. Sometimes the setting shapes their bodies more than their ancestry. Manatees may look like whales or walruses, but that is only because they adapted to the marine environment in a similar way. Martha Foley and Curt stager talk about convergent evolution. >> listen …

Why don’t whales have saliva?

The adaptation 50 million years ago of a lineage of terrestrial mammals to aquatic environments is one of the most well understood events in mammalian evolutionary history. It’s also one of the most dramatic. >> read more …

Genes lost during the transition from land to water in cetaceans highlight genomic changes associated with aquatic adaptations

The ancestors of modern cetaceans (whales, dolphins, and porpoises) transitioned from a terrestrial to a fully aquatic lifestyle during the Eocene about 50 million years ago. This process constitutes one of the most marked macroevolutionary transitions in mammalian history and was accompanied by profound anatomical, physiological, and behavioral transformations that allowed cetaceans to adapt and … Meer lezen

Researcher charts advances in marine mammal genetic sequencing

Answers to evolutionary and ecological mysteries about marine mammal species may be closer at hand, thanks to advances in genetic sequencing techniques for so-called nonmodel organisms. Kristina Cammen, a National Science Foundation postdoctoral fellow in biology and soon-to-be assistant professor of marine mammal science at the University of Maine (starting May 2017), led the research … Meer lezen

Ontbrekende schakel walvisevolutie

Wetenschappers uit Nieuw-Zeeland hebben een nieuwe prehistorische soort walvis geïdentificeerd die de ontbrekende schakel blijkt te zijn tussen de moderne baleinwalvis en hun uitgestorven voorouders die nog over een mond vol tanden beschikten. >> Lees artikel … >> Nl-vertaling …

Hoe walvissen zich aanpasten aan leven in het water

Ansan (Korea), 24 november 2013 – Wetenschappers van The Korea Institute of Ocean Science and Technology zijn erachter gekomen hoe walvissen zich evolutionair aangepast hebben aan leven in water. Zij hebben daartoe genetisch materiaal van walvissen uitvoerig geanalyseerd. >> Lees verder … >> Oorspronkelijk artikel in Nature Genetics …