There are two giant, mysterious blobs full of hot magma lurking at the edge of Earth’s core.
They are hidden where the planet’s molten iron core meets its rocky mantle, floating like mega-continents in the underworld.
The first mystery of these hulking, hidden seismic features is whether they’re made of different stuff than the rest of the Earth’s mantle.
The second mystery is how do these patterns in the deep leave traces on our surface world?
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https://strangesounds.org/2020/01/two-mysterious-blobs-ancient-magma-under-africa-pacific-video.html