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25 major events in Earth's 4.5 billion year history

Explore 25 Major Events in Earth's 4.5 Billion Year History. Discover pivotal moments from its formation to the rise of life.
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Is there a place on Earth that is exactly the same if humans had never arrived? Or have we irreversibly changed the world forever?

Is there somewhere on Earth that is completely unaffected by humans? Caroline Steel investigates ...