Ha!! I note that the Sydney Morning Herald (surely one of Australia's premier newspapers) has chosen to head their take on this story in some web editions with the line:
"The human bones that prove 'there was no Garden of Eden'
Not sure why, unless its a reaction to recent controversy over gay marriage with a former tennis stare (Margaret Court) turned christian fundamentalist minister leading the charge.
Anyway the SMH provided added detail with more information concerning the dating methodology:
"Professor Grun and other geochronologists, led by Associate Professor Daniel Richter from the Max Planck Institute, used two methods to determine the age of the specimens.
One used a technique that measured the build-up of uranium and thorium isotopes in the tooth enamel. This put the age of the human tooth at 286,000 years, plus or minus 32,000 years.
The other technique looked at the build up of electrons in quartz in flint artefacts that had previously been heated.
Dr Kira Westaway, a geochronologist from Macquarie University not connected with the study, said: "In this application they've used flint artefacts that have been deliberately or accidentally heated."
She said during extreme heating electrons are expelled from "traps" in the quartz and rebuild during non-heating periods.
"We can work out the date of the last major heating event by measuring how many electrons have been trapped ... The build-up is proportional to the amount of time since heating."
There was also a nice pik of the site.
with the comment:
"Co-author of the paper dating the fossils Dr Shannon McPherron, also from Max Planck Institute, said: "The overall picture we have [from this dig] is of a hunting encampment in a cave on a hill, with early humans taking shelter as they move across the landscape."
He said the site had strong evidence of fires and a mix of animal remains – gazelle, zebra and even lions – that these humans consumed. There were also stone tools – cutting implements and spear heads – they had presumably used to hunt and consume those animals."