The Mystery of the Giant Blobs at the Center of the Earth
SMRTR summary
Two massive blobs deep inside the Earth, one beneath Africa and one beneath the Pacific Ocean, have puzzled scientists since their discovery in the 1980s. These structures slow down earthquake sound waves without weakening them. They could be ancient crustal material that melted into dense rock, or remnants of a planet that collided with early Earth billions of years ago — possibly explaining why no debris from that collision has ever been found.
SMRTR provides this summary for quick context. The original article belongs to Nautilus.
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