More than 7000 life-size terracotta solders are unearthed at Xi'an, placed to guard the tomb of the third century BC Chinese emperor Shi Huangdi

Excavation of the 5200-year-old passage grave at Newgrange in Ireland is completed

Mary Leakey and her team find footprints, about 3.6 million years old, of bipedal hominids walking upright at Laetoli in Tanzania

Royal tombs are excavated at Vergina, in Macedonia, probably including that of Philip of Macedon

8,000-year-old human remains are found in a waterlogged burial site at Windover, in Florida

The Turkana Boy, the most complete known skeleton of Homo erectus, is found near Lake Turkana by Kamoya Kimeu in Richard Leakey's team

A man found frozen high in the Alps turns out to be a neolithic hunter from about 5000 years ago

Potholers discover the world's oldest known paintings in the Chauvet cave in southern France

Coastal erosion reveals Seahenge, a 4,000-year-old circle of oak posts in Norfolk