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  • (-) Extinctions (40)
  • Ancient Seas (16)
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  • Paleobiology (23)
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  • Whales (11)
  • Smithsonian collections (9)
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  • Behind-the-scenes (3)
  • Scientific illustrations (3)
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A fossil imprint of Haplophrentis carinatus with two oar-like appendages.
Photo

Haplophrentis carinatus

The Haplophrentis carinatus had two oar-like appendages (called “helens”) used...
A handful of fossil pieces from the Cambrian period sit on a gray background.
Photo

Scientists and Fossils

Fossils from the Cambrian period are found throughout the world. The Chengjiang...
Colorful illustration of extinct Archaeocyatha that lived on the seafloor.
Photo

Archaeocyatha

The peaceful Archaeocyatha lived during the most recent part of the Cambrian...
Illustration of Opabinia with five eyes and what look like scales.
Photo

Opabinia

Opabinia was a strange looking creature: it had five mushroom-like eyes that...
A fossil imprint of Ottoia prolifica.
Photo

Ottoia prolifica

The Ottoia prolifica has proven that cannibalism did exist in the Cambrian period...
An image of a Anomalocaris canadensis fossil.
Photo

Anomalocaris canadensis

Reaching almost three feet (one meter) long, Anomalocaris canadensis was enormous...
A bright illustration of extinct predator Hurdia victoria.
Photo

Hurdia Victoria

The great predator Hurdia victoria’s prey consisted of trilobites and other...
A close-up image of a fossil shark jaw with teeth.
Photo

Teeth and Jaw of an Ancient Shark

This well-preserved fossil is the only intact partial skull ever found of a white...
Gabor Szathmary secures one of the plaster jackets containing a fossil "toothed" mysticete that was excavated on Vancouver Island.
Photo

Fossils Get a CT Scan

When paleontologists, like the Smithsonian National Museum of Natural History's own...
This jellyfish fossil is from the Cambrian period, more than 500 million years ago.
Photo

Fossil Jellyfish

How long have jellyfish lived in the ocean? This jellyfish fossil is from the...
Paleobiologist Mark D. Uhen drills away rock to reveal the fossilized bones of Peruvian archaeocetes (ancient whales), in the Vertebrate Paleontology Department at the Museo de Historia Natural de San Marcos. Uhen is a professor at George Mason Univer
Photo

Preparing a Fossil Whale Specimen

Paleobiologist Mark D. Uhen drills away rock to reveal the fossilized bones of...
A relative of insects, trilobites lived on the ocean floor during the Cambrian period.
Photo

Trilobites

A relative of insects, trilobites lived on the ocean floor during the Cambrian...

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    • Census of Marine Life
  • Planet Ocean
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    • Waves, Storms & Tsunamis
    • The Seafloor
    • Temperature & Chemistry
  • Through Time
    • Ancient Seas
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    • Evolution
    • The Anthropocene
  • Conservation
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