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Jun 22 2011 - 2:48pm
Paeleobiologist Dr. Nicholas Pyenson, Curator of Fossil Marine Mammals for the Smithsonian's National Museum of Natural History (NMNH), set out with Jorge Velez-Juarbe, NMNH Research Student and Ph. D. Candidate at Howard University and Aaron O'Dea from the Smithsonian Tropical Research Institute...
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Sep 24 2010 - 6:00pm
What makes a top predator? Razor-sharp teeth? Speed? Strength? Size? Who is the most fearsome hunter? It depends on where and when you look.
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Jan 26 2012 - 11:26am
Sirenians, or seacows, are a group of marine mammals that include manatees and dugongs. In the modern ocean, only one species of seacow is found in each world region, however, the fossil record tells a different story. According to the fossil record of these marine mammals, which dates back 50...
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Sep 12 2011 - 2:55pm
These are fossil remains of archaeocetes, ancient whales, from the Paracas Formation of Peru's Pisco Basin. Smithsonian paleobiologist Nicholas D.
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Sep 12 2011 - 11:43am
Offshore Peru, during the Eocene (~56-34 million years ago), showing three archaeocetes (ancient whales), along with a previously described fossil penguin.
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Mar 8 2012 - 12:30pm
Monodontids, the group of whales that includes living belugas and narwhals, are emblematic symbols of the Arctic. However, the fossil record shows that these animals had a much larger range than the northern pole.
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Sep 30 2009 - 11:21am
Whales have existed for million of years. Watch this animation, from the Sant Ocean Hall, to see how they evolved from land-dwellers to the animals we know today. Discover more about whale evolution in our Ocean Over Time interactive. Note: this video contains no audio.
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Jan 26 2010 - 11:45am
A scientific illustration of the most powerful fish of its time, Carcharodon megalodon, which swam the ocean 30 million years ago. This shark may have reached a size of 20 meters/66 feet. Meet other ancient top predators and modern great white sharks.
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Mar 21 2013 - 9:20am
This well-preserved fossil is the only intact partial skull ever found of a white shark that lived about 6.5 million years ago called Carcharodon hubbelli. The fossil jaw contains 222 teeth, some in rows up to six teeth deep, and may provide evidence that modern day great white sharks evolved from...
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Sep 12 2011 - 2:08pm
George Mason University professor Mark D. Uhen and Dr. Matthew Lewin of the University of California, San Francisco, survey rocks of the Paracas Formation, in the southern part of Peru's Pisco Basin. The two were part of a team that discovered South America's oldest fossil whales, to date.
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Aug 21 2012 - 8:51am
This early whale was well suited to life at sea. But it also lived on land. An ancestor of the right whale, Maiacetus lived 49-40 million years ago. It had flipper-like limbs and webbed feet, like modern seals. But it also had ankle bones - clues that although Maiacetus swam, its...
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Jun 22 2011 - 5:44pm
Paeleobiologist Dr. Nicholas Pyenson, Curator of Fossil Marine Mammals for the Smithsonian's National Museum of Natural History (NMNH), set out with Jorge Velez-Juarbe, NMNH Research Student and Ph. D. Candidate at Howard University and Aaron O'Dea from the Smithsonian Tropical Research Institute...
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Aug 9 2012 - 10:27am
Where ocean currents were strong, ancient rudist “recliners” lay unattached on the seabed. Notice the pink tentacles, which were used to filter feed. Learn more about ocean life throughout deep time in our Ocean Over Time interactive or an image gallery.
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Jun 23 2011 - 11:20am
A time-lapse video shows researchers from the Smithsonian's National Museum of Natural History and Smithsonian's Tropical Research Institute racing to excavate the fossil of an extinct toothed whale on a beach in Piña, Panama. The fossil is from the Squalodontidae group, commonly known as "shark-...
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Aug 15 2012 - 9:45am
The fossil tooth whorl of the ancient shark Helicoprion, dating back 290 million years before present. For a long time, people didn't know what the shark looked like—but, thanks to a CT scan of a fossil, researchers finally put the pieces together in 2013. Read more about this story in our ...
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May 11 2012 - 9:58am
Editor's note: Read Nick's first blog post about "toothed" baleen whales to see what their team is excavating on Vancouver Island.
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May 11 2012 - 11:46am
Nick Pyenson, curator of fossil marine mammals at the Smithsonian's National Museum of Natural History, holds an arm bone from a "toothed" mysticete from Vancouver Island. This is the second specimen found at this locality on the remote western side of Vancouver Island. Nick used a rock saw to...
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Jun 18 2011 - 10:06am
A fossil vertebra that a Smithsonian researcher's mother found while prospecting in the Gatun Formation. It's not just any vertebra, it belongs to a fossil sea cow! According to Jorge Valez-Juarbe, a graduate student at the Smithsonian's National Museum of Natural History and expert on fossil sea...
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Sep 30 2011 - 6:38am
Smithsonian curator of fossil marine mammals Nick Pyenson and a team of collaborators are heading into Chile's Atacama Desert, shown here. They'll study a rich bonebed of fossil marine vertebrates that lived off the Chilean coast around 8 million years ago.
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Jan 26 2012 - 12:23pm
Jorge Velez-Juarbe is Predoctoral Fellow in the Department of Paleobiology at Smithsonian’s National Museum of Natural History.
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Feb 26 2013 - 10:35am
Two fossilized teeth from a megalodon (Carcharodon megalodon) dating back more than 20 million years.
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May 7 2012 - 3:54pm
Nick Pyenson, the curator of fossil marine mammals at the Smithsonian's National Museum of Natural History, points to the skull and skeleton of a fossil "toothed" mysticete (baleen whale) on the West Coast Trail of Vancouver Island in 2009. The skeleton, which is being excavated this spring 2012 by...
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Apr 12 2013 - 11:29am
How long have jellyfish lived in the ocean? This jellyfish fossil is from the Cambrian period, more than 500 million years ago. It was found buried in Utah—an area that used to be underwater, covered by the ocean. Fossil jellyfish are rare because they have no bones or other hard parts to turn into...
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Jan 26 2010 - 11:45am
Rudist clams are mollusks that went extinct about 65 million years ago. They were the reef builders of the Cretaceous Period, the heyday of the dinosaurs. Today corals have taken over the role rudists once filled.
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