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Its hearing organ, the cochlear duct, was long, indicating good hearing of low-frequency sounds transmitted over long distances, perhaps to keep track of other members of the herd when they were out of sight, Witmer said.

Timurlengia’s long cochlear duct — the part of the inner ear that controls hearing — also resembles that of its successors, which suggests that it would have shared their ability to hear low-frequency sounds, enabling it to hear prey from great distances.