Spanish Cave Chamber Shows More Than 11,000 Years of Repeated Human Activity

A hidden chamber in northern Spain’s Ojo Guareña cave system preserves evidence of human activity from the late Upper Paleolithic to the Iron Age.

Interior view of the chamber, showing the black geometric figures near the centre of the photograph. Credit: M. Á. Martín

The chamber, known as Sala Keimada, is part of Cueva Palomera, the main cave o…