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Nobody "discovered" earth, in the sense that European Explorers were said to have "discovered" The Americas and Australasia.

Planet Earth formed over 4 billion years ago and life first formed about 1 billion years later.

The first Human life as we understand it today originated about 200,000 years ago so it could be said that those early humans "discovered" the planet. Regrettably, there is no record of any of their names.
Every being discovers Earth in a manner unique to them. In particular, the Earth known to the Birds differs from that known to the Fish, and different again from that known to most Land Animals.

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12y ago

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