Scientists say the young Homo naledi was between 8-15 years old. Further research could determine whether the species was more ape-like or human-like in its maturation.
"These fossils and this science is about our shared human heritage."
The discovery of more remains in a hard-to-reach cave raises more questions than it answers about Homo naledi and humans.
The discovery of ancient human remains in an important cave site in South Africa raises major questions about the evolution of our direct ancestors, Homo sapiens.
Human evolution: the skeletons in the closet
The species, Homo naledi, resembles modern humans in many ways.
Researchers believe the new species, named Homo naledi, could be the oldest branch of the human evolutionary tree.