Centuries-old technique reveals hidden ‘3D’ animals in Paleolithic cave art


Using an unconventional, centuries-old method, researchers have identified hidden animal figures on the walls of a cave in Spain. The technique, called stereoscopic photography, dates back to the early 1800s but is perhaps best known for its use in the View-Master, the pre-VR viewer beloved by generations of kids.

Cave paintings are a well-known and long-standing artistic medium in Europe, dating back at least 40,000 years. Although archaeologists have studied this ancient art form for over a century, their focus has typically been on the two-dimensional features of the designs and, when recording the art, they have relied on sketches, tracings and photographs.


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