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This fossil tooth whorl of the ancient shark Helicoprion , dates back 290 million years. For a long time, people didn't know what the shark looked like—but, thanks to a CT scan of a...
A behind the scenes look at the NMNH ocean-related collections and their...
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Editor's note: Read Nick's first blog post about "toothed" baleen whales to see...
For the last 150 years, paleontologists have debated the origins of the great...

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A behind the scenes look at the NMNH ocean-related collections and their importance to research and discovery.
This fossil tooth whorl of the ancient shark Helicoprion , dates back 290...
Offshore Peru, during the Eocene (~56-34 million years ago), showing three...

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When the cod fishery collapsed in Newfoundland in the early 1990s, the hopes of the local fish harvesters collapsed with it...
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...
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...
This fossil tooth whorl of the ancient shark Helicoprion , dates back 290 million years. For a long time, people didn't know what the shark looked like—but, thanks to a CT scan of a fossil,...
CREDIT: Smithsonian Arctic Studies Center Basque Whalers Background Having already learned to hunt large whales in the Bay of Biscay in the 13th through 15th centuries, Basques began arriving in the...
Reaching almost three feet (one meter) long, Anomalocaris canadensis was enormous for this time period.
The whales that we see in today's world can broadly be split into two groups: those with teeth (odontocetes), and those that have baleen (mysticetes) instead of teeth. These two groups share a common...
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...
Jorge and I packed up the night we arrived in Panama with Aaron O'Dea and his team from STRI . The road we took in two field vehicles mostly followed the Panama Canal heading northwards; we had to...
Jorge and I arrived in Panama City around 3 pm this afternoon, and took a taxi to the Smithsonian Tropical Research Institute (STRI)'s headquarters in the Gorgas neighborhood of downtown Panama City...
Editor's note: Read Nick's first blog post about "toothed" baleen whales to see what their team is excavating on Vancouver Island. We departed from Port Renfrew on Tuesday morning on the Michelle...
The Wiwaxia corrugata may have molted its scales in order to grow past these hard boundaries.
Long before great white sharks appeared, much larger ancestors roamed the ocean. This giant ancient shark -- the Giant Megatooth ( Carcharodon megalodon ) -- was probably big enough to eat a whale.
Monodontids, the group of whales that includes the belugas and narwhals swimming our ocean today, are emblematic symbols of the Arctic. However, their fossil record, although scarce, suggests that...
A reconstruction of a new fossil beluga relative, Bohaskaia monodontoides , described by Smithsonian scientists, is in the foreground. Its living relatives, the beluga and narwhal, are illustrated...
Chilean and Smithsonian paleontologists study several fossil whale skeletons at Cerro Ballena, next to the Pan-American Highway in Atacama Region, Chile, in 2011. The fossils were discovered when the...
These deep-sea sediment cores were drilled from beneath the seafloor, and hold information about millions of years of ocean and atmospheric chemistry. As dirt, dead organisms, and other particles...
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...
Dugongs , along with manatees , make up a group of marine mammals called sirenians or seacows . In the modern world, only one species of seacow is found in any one place in the world. However, the...
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