They used a visual technique called stereoscopic photography to see the cave art like never before. The technique made the art look 3D, which helped the archeologists make their new discovery. That's why a team of researchers recently used a technique called stereoscopic photography to observe the cave art in a unique new way. Advertisement Advertisement Watch:Stereoscopic photography is a technique that uses two separate images to give the illusion of 3D. Tracings or sketches might miss nuances in the rocks that 3D images can bring to life.

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