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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...
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The whales that we see in today's world can broadly be split into two groups:...
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Often it's the tiniest organisms that do the most harm. One example is...
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The evolution of whales represents one of the great stories in macroevolution...

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Offshore Peru, during the Eocene (~56-34 million years ago), showing three archaeocetes (ancient whales), along with a previously described fossil penguin. Top to bottom: Perudyptes devriesi , unnamed protocetid, Ocucajea...
How long have jellyfish lived in the ocean? This jellyfish fossil is from...
This well-preserved fossil is the only intact partial skull ever found of a...

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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...
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...
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...
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...
The Ottoia prolifica has proven that cannibalism did exist in the Cambrian period since there have been portions of one Ottoia prolifica found in another specimen’s gut.
Offshore Peru, during the Eocene (~56-34 million years ago), showing three archaeocetes (ancient whales), along with a previously described fossil penguin. Top to bottom: Perudyptes devriesi ,...
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...
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...
The peaceful Archaeocyatha lived during the most recent part of the Cambrian period. They separated into many families and were the Earth’s first reef-building animals.
Earth’s first animals had soft bodies. This illustration shows a community of soft-bodied Ediacaran (edi-A-karan) animals. Some species resemble living ocean creatures. Others are unlike any known...
When the cod fishery collapsed in Newfoundland in the early 1990s, the hopes of the local fish harvesters collapsed with it. Hundreds of Newfoundlanders moved away and businesses that depended on the...
The foot-long extinct shark Falcatus falcatus lived during the early Carboniferous period around 325 million years ago. The species, known from fossils in the Bear Gulch formation of Montana , was...
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...
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...
The Wiwaxia corrugata may have molted its scales in order to grow past these hard boundaries.
Opabinia was a strange looking creature: it had five mushroom-like eyes that allowed it to see predators approaching from many directions.
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...
These are fossil remains of archaeocetes, ancient whales, from the Paracas Formation of Peru's Pisco Basin . Smithsonian paleobiologist Nicholas D. Pyenson and a team of scientists discovered the...
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...
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