New evidence suggests that refined stone weapons were developed in Armenia about 325,000 years ago.
The skeletal fragment is about 8,000 years old and may have once belonged to an infant or a small child.
See 12 Neolithic masks, eerie stone portraits that were carved out of limestone some 9,000 years ago by Stone Age people.
The stenciled hand prints painted on the walls of Spanish caves 40,000 years ago are mostly women's hands.
One in six skulls recovered from a Neolithic site in Scandinavia reveals signs of everyday violence.