Più antico esempio di arte simbolica (Homo Sapiens):
Più antico esempio di arte simbolica (Homo Erectus):
Linguaggio in Homo Heidelbergensis:
- Carbonell, E.; Mosquera, M. (2006). “The emergence of a symbolic behaviour: the sepulchral pit of Sima de los Huesos, Sierra de Atapuerca, Burgos, Spain”. Comptes Rendus Palevol. 5 (1–2): 155–160
- Martínez, I.; Arsuaga, J. L.; Quam, R.; et al. (2008). “Human hyoid bones from the middle Pleistocene site of the Sima de los Huesos (Sierra de Atapuerca, Spain)” (PDF). Journal of Human Evolution. 54 (1): 118–124
- Lozano, Marina; Mosquera, Marina; De Castro, José María Bermúdez; Arsuaga, Juan Luis; Carbonell, Eudald (2009). “Right handedness of Homo heidelbergensis from Sima de los Huesos (Atapuerca, Spain) 500,000 years ago”. Evolution and Human Behavior. 30 (5): 369–76