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Access-restricted-item true Addeddate 2023-07-21 09:23:42 Associated-names Jacob, Annamma (Nurse), editor; Rekha R., editor; Tarachand, Jadhav Sonali, editor Autocrop_version 0.0.15_books-20220331-0.2 ...

A red dot added to a pebble that resembles a face suggests the species that preceded modern humans may have had a “complex mind” capable of producing symbols, researchers say.