SYDNEY, November 22 (Xinhua) – Research requested Thursday afternoon an international group of scientists, including Australia, created a much defined understanding of how and when our ancestors evolved, and even what the climate was like. t se.
It has long been accepted that the origin of man lies in Africa, and it was found back to fossils of # The called "Cradle of Humankind" cats in South Africa have told us so.
Still, scientists have been trying to make a clear time for fossils by missing a missing dating method.
The Professor of Trobe University, Professor Andy Herries, has conducted research on & # 39; the places say "while the South African record was the first African or the origin of people to show the complexity of the caverns and toughness they have intended to have it record remained interrupted. "
"In this study, we see that the streams in caverns almost like the volcanoes of East Africa can form in different mounds at the same time, so we can directly direct our direct and fossil to a regional follow-up," he said .
The Cradle or Humankindhaven Worldwide Index has nearly 40 percent of all known human ancestors made fossils, including the famous Australopithecus African skull, nicknamed Mrs Ples.
According to some researcher Robyn Pickering of the University of Cape Town, the team ensures that, create a model for the age of all fossils from & # 39; to explain the whole region, and to make a picture of the climate conditions of our ancestors.
"The streams are the key," said Pickering.
Tile stones are depots of lime or other carbonate minerals that form the water in highlands.
"We know that important flintstones only grow in heights in wet periods, if there are more pure outside the caverns – by streaming down, we will decrease these times of increased purity," said Pickering.
With the uranium lead-guidance techniques developed by the University of Melbourne, the team analyzes 28 streamstone layers between the fossil-rich sediment in eight caverns on the Cradle – the elderly of & # 39; to show fossils in six narrow time windows between 3.2 and 1.3 million years ago.
"We know that in the meantime, in the meantime, when the caverns are open, the climate and more than what we are now experiencing," she said.
According to experts, this is a surprising breakthrough, that's a lot contributing to the record of humanity and the understatement of # 39; the life of the common ancestors that has developed us.