Secrets of the Dead | Clip | Wasps Surround Oldest Traces of Human Settlement in Amazonia

Archaeologist Edithe Pereira travels deep into the heart of the Monte Alegre region of Brazil to study paintings found on the rockface there. Careful to avoid the surrounding wasp nests, she and her team have dated these paintings to 12,000 BCE — the oldest known traces of human presence in the whole of Amazonia.