Fifty kilometers north of Mazatlan, Sinaloa, near the beach where a group of rocks with more than 600 petroglyphs, known as Las Labradas, Mexican investigators discovered an archaeological site of the archaic epoch. In this site, they found 60 arrow and spear heads estimated to be from between 2500 – 1000 BC, this means they were made more than 4000 years ago.
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