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Earth
Diameter: 12,760km
It is the only habitable planet that we know, thereby making it the only place that we can live. While it does indeed look majestic and everlasting, we each have a responsibility to take care of it.
Using radiometric dating, lunar rock samples, and meteorite analysis, scientists have estimated the Earth to be over 4.54 billion years old.
The largest living structure on Earth is known as The Great Barrier Reef. It stretches for over 2,300 kilometers and hosts 1,625 species of fish.
The first person to circumnavigate the globe was Juan Sebastian Elcano, after Ferdinand Magellan's death in the Philippines. They completed the journey in 1522.
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