Thomas N Headland

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Contemporary humans exhibit spectacular biological success derived from cumulative culture and cooperation. The origins of these traits may be related to our ancestral group structure. Because humans lived as foragers for 95% of our species' history, we analyzed co-residence patterns among 32 present-day foraging societies (total n = 5067 individuals, mean(More)
Relationships between primates and snakes are of widespread interest from anthropological, psychological, and evolutionary perspectives, but surprisingly, little is known about the dangers that serpents have posed to people with prehistoric lifestyles and nonhuman primates. Here, we report ethnographic observations of 120 Philippine Agta Negritos when they(More)
There are 6,809 languages spoken in the world today. Conservative estimates are that the world's languages are currently dying at the rate of at least two languages each month, and linguists predict that most of today's languages will die out in the next 100 years. Since 1962, the author has been gathering field data on some of the smallest language groups(More)
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