Multimedia·Feature

Revealing the invisible

Specialized software reveals an extra line to the left and possibly the remnants of a fifth to the right of this Ice Age geometric sign found at Isturitz cave in France. Move the slider to see the before and after.

Specialized software reveals an extra line to the left and possibly the remnants of a fifth to the right of this Ice Age geometric sign found at Isturitz cave in France. Move the slider to see the before and after.

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