News tagged with cetacean ancestors
Getting a leg up on whale and dolphin evolution
When the ancestors of living cetaceans—whales, dolphins and porpoises—first dipped their toes into water, a series of evolutionary changes were sparked that ultimately nestled these swimming mammals into the ...
Sep 24, 2009 |
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New technique fills gaps in fossil record
University of Pennsylvania evolutionary biologists have resolved a long-standing paleontological problem by reconciling the fossil record of species diversity with modern DNA samples.
Sep 19, 2011 |
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Researchers find first genetic evidence for loss of teeth in the common ancestor of baleen whales
(PhysOrg.com) -- In contrast to a toothed whale, which retains teeth that aid in capturing prey, a living baleen whale (e.g., blue whale, fin whale, humpback, bowhead) has lost its teeth and must sift zooplankton ...
Sep 29, 2010 |
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The protective brain hypothesis is confirmed
"In the past, it was thought that one of the selective advantages of having a large brain is that it facilitates the development of new behaviour to respond to the ecological challenges that the individual has not experienced ...
Jul 16, 2010 |
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Biologists report how whales have changed over 35 million years
(PhysOrg.com) -- Whales are remarkably diverse, with 84 living species of dramatically different sizes and more than 400 other species that have gone extinct, including some that lived partly on land. Why are there so many ...
May 28, 2010 |
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The bizarre lives of bone-eating worms
The females of the recently discovered Osedax marine worms feast on submerged bones via a complex relationship with symbiotic bacteria, and they are turning out to be far more diverse and widespread than scientists expected. ...
Nov 09, 2009 |
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Humpback whales have brain cells also found in humans
Cetaceans, the group of marine mammals that includes whales and dolphins, have demonstrated remarkable auditory and communicative abilities, as well as complex social behaviors. A new study published online November 27, 2006 ...
Biology /
Nov 27, 2006 |
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Scientists find missing link between the whale and its closest relative, the hippo
For those not yet convinced that hippos and whales are first cousins, a UC Berkeley researcher has the definitive proof. A group of four-footed mammals that flourished worldwide for 40 million years and the ...
Jan 25, 2005 |
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