Then we found caves with paintings

Dating back to years ago

We had to go in the jungle for weeks at a time. Caves are one of Earth's last remaining great frontiers.

Smith developed the new technique as part of her doctoral thesis. The researchers studied a juglet from the British Museum. These near-inaccessible artworks are now known to be far older than previously thought. It is interesting because there are different styles of rock art in Europe.

These degradation-resistant opiate alkaloids do not include morphine, Smith noted. This ages the limestone crusts that have grown over the art. Now, researchers from University of York and the British Museum have used a range of analytical techniques to provide the first rigorous evidence that the vessels did in fact contain opium. The second has hand stencils in a purple or mulberry colour. Now the red and orange cave art, which depicts a bison-like creature, is the earliest known coloured image of a figure.

Originally published on Live Science. The researchers stress that it's still unclear exactly how the juglet was used.

One previous hypothesis was that the juglet could have been used to hold poppy seed oil used for anointing or in a perfume. The containers were widely traded in the eastern Mediterranean around to B. The study is published yesterday Oct. Sometimes we went off track. Then we found caves with paintings.

This gave rise to a new rock art style - including rare portrayals of humans - at a time when the global ice age climate was at its most extreme. But reliable evidence linking the containers to opium has been lacking. Now, researchers have discovered traces of opium in one of these containers. The incredible discovery was made in a cave in deepest Borneo, Indonesia.

One previous hypothesis wasThe containers were widely traded in