Dating skeletal remains
Settlers could have crossed over to Australia and New Guinea – that were united as one continent (Sundaland and Sahul) at the time due to lower sea levels – as early as 55,000 years ago.The following table shows any geographical region at some point defined as a country – not necessarily a modern-day sovereign state – or any geographically distinct area such as an island, with the date of the first known or hypothesised human settlement.Uranium series analyses of human bone samples from the Del Mar and Sunnyvale sites indicate ages of 11,000 and 8,300 years, respectively.The dates are supported by internal concordancy between thorium-230 and protactinium-231 decay systems. They are presented here as part of the commitment to make the examination data and reports of the scientific team available and accessible to educators, reporters, scientists, and interested citizens. The human remains that have come to be referred to as the Kennewick Man, or the Ancient One, were found in July, 1996 below the surface of Lake Wallula, a pooled part of the Columbia River behind Mc Nary Dam (Nickens 1998).This chapter describes the administrative, legal, and regulatory background for the government's investigation of the Kennewick remains, now being carried out by the National Park Service (NPS) and Department of the Interior (DOI). The remains were found under the water, but close to the river terrace that contains Columbia Park in Kennewick, Washington.
The discovery of these fossils pushes back the oldest fossil evidence of the homo sapiens by 100,000 years.
For instance, 14C and 90Sr bomb pulse dating covers the last 60 years and give reliable PMI when teeth or bones are available.
232Th series dating has also been proposed but requires a large amount of bones.
“Neanderthals and their ancestors – which go back about 400,000 years – and humans are the only species we know that intentionally buried their dead, so this cave adds another species to the list of relatives who participated in this most human of behaviors.” The new discovery and research was done by a large team of scientists from the University of Witwatersrand in South Africa and more than 30 additional universities and institutions.
The age of the original remains found in the cave system has been revealed to be younger than previously believed and was lived between 335,000 to 236,000 years ago.