It's no secret humans have been having sex for millennia -- but recently discovered cave art suggests they were doing it in the Americas much earlier than many archeologists believed.
A new exhibit in Brazil showcases artifacts dating as far back as 30,000 years ago -- throwing a wrench in the commonly held theory humans first crossed to the Americas from Asia a mere 12,000 years ago.
The 100 items on display in Brasilia, including cave paintings and ceramic art, depict animals, ceremonies, hunting expeditions -- and even scenes from the sex lives of this ancient group of early Americans.
The artifacts come from the Serra da Capivara national park in Brazil's northeastern Piaui state, on the border of the Amazon and Atlantic Forests, which attracted the hunter-gatherer civilization that left behind this hoard of local art.
Since the 1970s, Franco-Brazilian archaeologist Niede Guidon has headed a mission to carry out large-scale excavation of Piaui's interior.
"It's difficult to think there exists a site anywhere with a higher concentration of cave art," the 80-year-old Guidon told AFP.
Many paths led to Americas
Other traces of the civilization include charcoal remains of structured fires, explained Guidon, who hails from Sao Paulo.
"To date, these are the oldest traces" of human existence in the Americas, she emphasized.
The widely held theory has suggested human beings only reached the Americas some 12,000 years ago from Asia, crossing the Bering Strait to reach Alaska.
Some archeologists contend flaked pebbles at the Brazilian sites are not evidence of a crude, human-made fire hearth made some 40 millennia ago, but are rather geofacts -- a natural stone formation, not a man-made one.
But Guidon said she believes the Serra dwellers may have come originally from Africa, and she said the cave art provides compelling evidence of early human activity.
The paintings are estimated to date back some 29,000 years, she said, noting: "When it began in Europe and Africa, it did here too."
http://www.globalpost.com/dispatch/...ic-brazil-artifacts-star-exhibit-spark-debate