Antarctica, far from the frozen pole, was a temperate, forested landscape, hosting diverse flora and fauna that thrived in a climate more akin to modern-day Washington or southern Australia. This geographic isolation was a primary driver of the Cretaceous’s extraordinary biodiversity.
First Flowers Bloomed 100 Mya Earth
The Senses of an Ancient World. Global temperatures were significantly warmer than today, with average surface temperatures perhaps 6 to 8 degrees Celsius higher.
Polar regions were ice-free, and sea levels were exceptionally high, flooding continental interiors and creating vast, shallow inland seas that split continents like North America into isolated landmasses. Terrestrial ecosystems were dominated by dinosaurs, ranging from the formidable predatory theropods to the colossal, long-necked sauropods.
First Flowers Bloomed 100 Mya Earth
The Shifting Continents: A Map in Flux The physical arrangement of the world’s continents was dramatically different. Yet, if one could rewind the clock approximately 100 million years ago, the world would appear unrecognizable, a planet operating under alien rules of geography, climate, and biology.
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