According to a new study led by Patrick Roberts of the University of Oxford, UK, early human foragers relied primarily on rainforest resources from at least 20,000 years ago. Mountain forest in Sri Lanka. Image credit: Faslan / CC BY-SA 3.0. The study, published in the journal Science, analyzed the carbon and oxygen isotopes in the teeth of 26 individuals, with the oldest dating back 20,000 years. All the teeth suggested a diet largely sourced from...
