How Did Paleolithic People Light Up Their Caves?

SANTANDER, SPAIN—According to a statement released by the Public Library of Science, a team of researchers led by Mª Ángeles Medina-Alcaide of the University of Cantabria tested possible sources of light employed by Paleolithic peoples to reach the deepest, darkest areas of caves. The lights, including torches made of sticks from five different trees, two stone lamps fueled with animal fat, and oak and juniper burned in a small fireplace, were based upon archaeological evidence