Symbols Found in Ice Age Caves Across Europe (2015)
The mainstream view of our history has some massive unexplained mysteries. For example the ability of ancient people to work with massive slabs of stone in a way we'd struggle to do now even with modern machinery. Not just the Pyramids and Stonehenge, but the stone foundations at Cuzco and also Baalbeck temple which apparently has foundational stones estimated to weigh 1000 tons.