For a long stretch of Earth’s history, the continents were not separated by wide oceans. They were joined into a single landmass known as Pangaea. It formed slowly, through collisions that took place ...

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When the supercontinent Pangea began to fragment around 200 million years ago during the Early Jurassic, it reshaped the face of the planet. Vast new oceans opened, continents drifted apart and the ...

About 56 million years ago, Europe and North America began pulling apart to form what became the ever-expanding North Atlantic Ocean. Vast amounts of molten rock from Earth's mantle reached the ocean ...

"An epic exploration of possibilities. What If is a Webby Award-winning science web series that takes you on a journey through hypothetical worlds and possibilities, some in distant corners of the ...