- Neandertal cave art suggests they were ancient humans’ mental equals. The world's oldest cave art predates the arrival of humans in Europe by at least 20,000 years, suggesting Neandertals had the capacity for symbolic thinking. https://www.sciencenews.org/article/cave-art-suggests-neandertals-were-ancient-humans-mental-equals?utm_source=reddit&utm_medium=social&utm_campaign=r_science 5 comments science