The Senses of an Ancient World. In the north, the Atlantic Ocean was a narrow seaway, but it was widening rapidly.
Polar Forests, Dinosaurs, and Sunlight: A Look at 100 Million Years Ago
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. North America was separated from Europe by the Tethys Ocean, and South America was just beginning its slow northward journey toward Central America.
Underwater Ecosystems and Flowering Plants The oceans were equally vibrant and terrifying. 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.
Polar Forests, Dinosaurs, and Sunlight in the Cretaceous World
Continental Drift and Its Consequences The movement of these continents reshaped ocean currents and global climate patterns, creating unique environments. The Cretaceous World: A Greenhouse Planet Geologically, 100 million years ago places us squarely in the middle of the Cretaceous Period, an era that began roughly 145 million years ago and ended 66 million years ago.
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More perspective on What did the world look like 100 million years ago can make the topic easier to follow by connecting earlier points with a few simple takeaways.
