A nearly eight-mile-long “mural” believed to have been painted during the Ice Age between 12,600 and 11,800 years ago, has been discovered in rock shelters in the Amazon rainforest. The prehistoric artists used natural ochre to depict people interacting with now-extinct creatures such as mastodons and giant sloths, as well as renderings of deer, alligators, bats, monkeys, horses, and other animals. The rock art also includes hunting scenes and images of ancient plants.

“These really are incredible images, produced by the earliest people to live in western Amazonia. They moved into the region at a time of extreme climate change, which was leading to changes in vegetation and the make-up of the forest. The Amazon was still transforming into the tropical forest we recognise today,” says Mark Robinson, one of the studies co-researchers, in a statement. “The paintings give a vivid and exciting glimpse into the lives of these communities. It is unbelievable to us today to think they lived among, and hunted, giant herbivores, some which were the size of a small car.”

The images stretch across eight miles of rock walls in the archaeological site Serranía La Lindosa, on the northern edge of the Colombian Amazon.

“These rock paintings are spectacular evidence of how humans reconstructed the land, and how they hunted, farmed and fished,” says José Iriarte, a fellow co-researcher. “It is likely art was a powerful part of culture and a way for people to connect socially. The pictures show how people would have lived amongst giant, now extinct, animals, which they hunted.”

The excavation of the paintings was reportedly carried out last year, but the discovery had not been made public until now, because, according to The Guardian, it was being documented by the British broadcaster Channel 4 as part of a series titled “Jungle Mystery: Lost Kingdoms of the Amazon”, which will debut on 5 December. The series will be hosted by archaeologist and explorer Ella Al-Shamahi, who told The Observer the site “is so new, they haven’t even given it a name yet”, although media has dubbed it the “Sistine Chapel of the ancients”.

Al-Shamahi also noted the incredible vertical scale of the paintings, with some images rendered so high on the rockface that they could only be documented by using drones. “I’m 5ft 10in and I would be breaking my neck looking up,” she said. “How were they scaling those walls?” Iriarte told the Guardian he believes the answer is that the prehistoric artists constructed wooden towers, examples of which are depicted throughout the paintings. The founders of the archaeological project suspect there are many more paintings in the region that have yet to be unearthed. “We’re just scratching the surface,” Iriarte says.