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Bloodletting and sacrifice speculation

Although the archaeological record does not include explicit representation of Olmec bloodletting, researchers have found other evidence that the Olmec ritually practiced it. For example, numerous natural and ceramic stingray spikes and maguey thorns have been found at Olmec sites, and certain artifacts have been identified as bloodletters.

The argument that the Olmec instituted human sacrifice is significantly more speculative. No Olmec or Olmec-influenced sacrificial artifacts have yet been discovered; no Olmec or Olmec-influenced artwork unambiguously shows sacrificial victims (as do the danzante figures of Monte Albán) or scenes of human sacrifice (such as can be seen in the famous ballcourt mural from El Tajín).

At El Manatí, disarticulated skulls and femurs, as well as the complete skeletons of newborns or fetuses, have been discovered amidst the other offerings, leading to speculation concerning infant sacrifice. Scholars have not determined how the infants met their deaths. Some authors have associated infant sacrifice with Olmec ritual art showing limp werejaguar babies, most famously in La Venta's Altar 5 (on the right) or Las Limas figure. Any definitive answer requires further findings.