San Diego Natural History Museum
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Geologic Timeline: The last 144 million years of Earth's 4.6 billion year history.

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Refresh your knowledge of fossils, discover new information, meet experts in the field through classes, lectures, and films offered by the San Diego Natural History Museum.

Learning with Fossil Mysteries

The Paleotologist
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The Exhibits Designer
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Videos created by ITV Math 2 Success: Real World Math programming.


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Pleistocene Epoch 1.8 million-10,000 years ago.
Pliocene Epoch 5-1.8 million years ago.
Miocene Epoch 24-5 million years ago.
Oligocene Epoch 34-24 million years ago.
Eocene Epoch 53-34 million years ago.
Paleocene Epoch 65-55 million years ago.
Cretaceous/Tertiary Boundary Rock, 65 million years ago.
Cretaceous Period 144-65 million years ago.
Earth's history began 4.6 billion years ago.
MYA = million years ago.