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One of the ocean's tiniest organisms often does the most harm. Microscopic algae can grow rapidly to form harmful algal blooms (sometimes called "red tides"), which create unhealthy water conditions that can kill animals...
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The evolution of whales represents one of the great stories in macroevolution...
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Microscopic, single-celled organisms called foraminifera have a fossil record...
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Jorge and I packed up the night we arrived in Panama with Aaron O'Dea and his...

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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 you're standing in a museum surrounded by fossils, you can almost imagine drifting through time to when long-extinct...
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...
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,...
Brian Huber studies fossil organisms known as “ forams ” to learn about climate change in this video snippet from the Smithsonian Marine Collections video . More about world climate change can be...
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...
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 ,...
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...
One of the ocean's tiniest organisms often does the most harm. Microscopic algae can grow rapidly to form harmful algal blooms (sometimes called "red tides"), which create unhealthy water conditions...
Globotruncana falsostuarti -- a foram that lived about 75 million years ago, during the Cretaceous Period, from southeastern Tanzania. By measuring the chemistry in the shell, scientists can estimate...
Microscopic, single-celled organisms called foraminifera have a fossil record that extends from today to more than 500 million years ago. Although each foram is just a single cell, they build complex...
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...
During the late Cretaceous period, Kansas was covered by a vast sea. There, scientists have found fossils of Squalicorax sharks (also called crow sharks) that lived 70-80 million years ago. They were...
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...
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...
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...
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.
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...
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,...
The great predator Hurdia victoria’s prey consisted of trilobites and other smaller animals crawling on the seafloor.
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