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Prehistoric Life During the Devonian Period - Dinosaurs - About.com
From a human perspective, the Devonian period was a crucial time for the evolution of life: this was when the first vertebrate tetrapods climbed out of the ...
Prehistoric Sharks and Shark Evolution - Dinosaurs - About.com
Perhaps the most surprising shark from the Cretaceous period is the recently discovered ... Cladoselache A strange, scaleless shark of the late Devonian period.
Prehistoric Life During the Carboniferous Period
The global climate of the Carboniferous period was intimately linked with its geography. During the course of the preceding Devonian period, the northern ...
Devonian Period - Paleozoic Era - Timeline of Biological History
The Devonian Period (408-360 Myr BP) is the fourth of six periods that make up the Paleozoic Era. It is preceeded by the Silurian Period and followed by the ...
Fish Evolution - The Story of Prehistoric Fish - Dinosaurs - About.com
Perhaps because they were so slow and awkward, placoderms vanished by the end of the Devonian period, outclassed by two other newly evolved families of ...
Prehistoric Life During the Silurian Period - Dinosaurs - About.com
The shortest period of the Paleozic Era, the Silurian marks the time when the ... The Silurian Period (443-416 Million Years Ago) ... Next: the Devonian Period ...
The Story of Tetrapod Evolution - Dinosaurs - About.com
Tetrapod Evolution During the Devonian and Carboniferous Periods ... Ichthyostega was an important "fishapod" of the late Devonian period (Royal Tyrrell ...
Dunkleosteus - About.com Prehistoric Fish
The marine animals of the Devonian period--over 100 million years before the first dinosaurs--tended to be small and meek, but Dunkleosteus was a major ...
Prehistoric Life During the Cambrian Period - Dinosaurs - About.com
The Cambrian was the first period of the Paleozoic Era (542-250 million years ago), followed by the Ordovician, Silurian, Devonian, Carboniferous and Permian  ...
Periods of the Paleozoic Era - Evolution - About.com
The first period in the Paleozoic Era is known as the Cambrian Period. Many of the ... Diversification was rapid and widespread during the Devonian Period.
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