When a flickering torch is held up to prehistoric cave paintings they appear to “move.” This has led some researchers to theorize that they were intentionally designed to create this effect, which would make them a precursor to modern cinema.
Most cave paintings were probably made by women. How do we know this? Well, on average, female hands have a ring finger that is shorter than the index finger (whereas in men, it’s the other way around), and this difference is believed to have been more pronounced among ancient people. Applying this rule to the hand prints left on cave paintings, scientists have come to the conclusion that nearly three-quarters of them were made by females.