"About 14,000 years ago, a party of five barefoot people — two adults, one preteen and two children — walked and even crawled through a dark passageway in a cave, according to a new study that analyzed the hand- and footprints these individuals left behind." Source: Live Science.
"To light their way, these late Stone Age people likely burned bundles of pine (Pinus) sticks, which archaeologists also found in the cave, known as Grotta della Bàsura, in northern Italy."