I think acoustics are used to support a rotating molten facsimile of the earth for study.
We haven't begun to understand elephants yet, or how intelligent they are.
Elephants and blue whales could easily have more sophisticated brains than ours.
They are known to pass on large amounts of learned knowledge to their young.
Researchers have started recording their low frequency communication, and trying to understand them.
They can communicate over long distances because the lower frequencies travel so well.
They seem to mourn their own dead, and some humans too.
The woman that figured out how to save orphaned elephantshttp://www.sheldrickwildlifetrust.org/http://ngm.nationalgeographic.com/2011/ ... ebert-text