We examined the universality of the curse of knowledge by investigating it in a unique cross-cultural sample; a nomadic Nilo-Saharan pastoralist society in East Africa, the Turkana. Forty Turkana children were asked eight factual questions and asked to predict how widely-known those facts were among their peers. To test the effect of their knowledge, we taught children the answers to half of the questions, while the other half were unknown. Based on findings suggesting the bias’s universality, we predicted that children (...) would estimate that more of their peers would know the answers to the questions that were taught versus the unknown questions. We also predicted that with age children would become less biased by their knowledge. In contrast, we found that only Turkana males were biased by their knowledge when inferring their peers’ perspectives, and the bias did not change with age. We discuss the implications of these findings. (shrink)