How do scientist uses seismic waves to know these earmuffs are located in the mantle

1 answer:

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Then the scientists studied how this mineral behaved. For example, they looked into how dense bridgmanite becomes and how much it squashes. The team then compared these traits to what is known about the blobs themselves.

This research showed that in the lab, bridgmanite behaves much as does the mineral seen in the mantle’s blobs. The scientists also showed that bridgmanite isn’t rigid enough to hold together as an intact blob without help from something else. “This challenges the assumption that these piles are self-supporting,” Jackson says. “It’s evidence that there is something else propping them up.”

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- Bird wings and dragonfly wings are both used for flight: Analogous structure

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Analogous structures are similar structures that have the same or similar functions in unrelated organisms. Analogous structures aren't the result of evolutionary relationships among organisms (i.e., they were not inherited from a common ancestor). On the other hand, homologous structures are structures inherited from a common ancestor. Homologous structures may or may not have an identical function, but they are the result of evolutionary relationships among organisms and, therefore, they are genetically related.

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