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The cyanobacteria has an extensive fossil record. They're the oldest known fossil from Archaean rocks of wetern Australia, which are dated 3.5 billion years old.
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The first fish, at some stage in there life history, had gill slits in a region of their head. They had developed gills and a simple sort of spinal nerve.
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In the Cretaceous Period (144-65m mya), the first flowering plants (angiosperms) appeared. They evolved together with insects, birds, and mammals and radiated rapidly. In which dominating the landscape by the end of the Period.
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Approximately 230 MYA, during the Triassic Period, the dinosaurs appeared, from elvolving from reptiles. Plateosaurus was one of the first large plant-eating dinosaurs, It grew to about 9 meters in length.
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Pangaea started to break up into the continents that we know now during the middle of the Jurassic time period, about 175 million years ago. The cuase of this was the movement of plate tectonics. to this day the continents are still moving.
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A tiny furry-tailed creature were the ancestor of mice, elephants, lions, tigers, bears, whales, bats and humans once looked like. Reaserches say that these new findings also suggest this forerunner of most mammals appeared shortly after the catastrophe that ended the age of dinosaurs.
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Sixty-five million years ago the dinosaurs died out along with more than 50% of other life forms on the planet. This mass extinction is so dramatic that for many years it was used to mark the boundary between the Cretaceous Period, when the last dinosaurs lived, and the Tertiary Period, when no dinosaurs remained.
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First homo sapiens evolved in west Africa now owrldwide. Modern humans have larger brains than first humans.
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The Pleistocene Epoch is the first in which Homo sapiens evolved, and by the end of the epoch humans could be found in almost every part of the planet. The most recent Ice Age occurred then, as glaciers covered huge parts of the planet Earth.
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The first were marine reptiles, including lizards and snakes. The second were the archosaurs, which would give rise to crocodiles, dinosaurs and birds.
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Scientists believe that about 250 MYA alll the continents we have now were all connected at a point. Pangaea was still together during the time of the dinosaurs.
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