Standing on the surface of the Earth today, it is easy to view the familiar landscapes, cities, and ecosystems as a fixed and permanent stage for life. Terrestrial ecosystems were dominated by dinosaurs, ranging from the formidable predatory theropods to the colossal, long-necked sauropods.
Ancient Oceans Shaping Continents 100 Mya
This botanical revolution provided new niches and food sources, fueling further evolutionary innovation. The Shifting Continents: A Map in Flux The physical arrangement of the world’s continents was dramatically different.
As continents drifted toward their present positions, they carried with them distinct ecosystems, leading to high levels of endemism—meaning species evolved in isolation, creating unique life forms found nowhere else on the planet. The most striking feature of this ancient world was its climate.
Ancient Oceans Shaping Continents 100 Mya
In the north, the Atlantic Ocean was a narrow seaway, but it was widening rapidly. The Reign of the Dinosaurs and Rise of New Life While the age of dinosaurs was peaking, the fauna of 100 million years ago was far more diverse than the iconic giants of the plains.
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