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Gigantic hidden fortresses discovered 1,800 miles underground in Earth's mantle, rewrite how the planet's interior works.
From the water that covers most of it to the moon that orbits it, here are some bizarre things about our home planet that science still doesn't completely understand.
Could the destiny of continents and even the demise of the dinosaurs have been determined by monstrous, slow-moving BLOBS hiding thousands of kilometers under our feet? For decades, geoscientists have ...