Such plume activity, similar to that found on Saturn's moon Enceladus, could help researchers search for life from the subsurface European ocean without having to land on the moon.[151][152][153][154] Anthropologists provide evidence that the brain of Homo naledi, an extinct hominid which is thought to have lived between 226,000 and 335,000 years ago, was small, but nonetheless complex, sharing structural similarities with the modern human brain.[155][156]