Archaeology News Online

When and how the first humans made their way to Australia has been an evolving story. While it is accepted that humans appeared in Africa some 200,000 years ago, scientists in recent years have placed the approximate date of human settlement in Australia further and further back in time, as part of ongoing questions about the timing, the routes and the means of migration out of Africa. Excavations through many layers at the site [Credit: Dominic O Brien/Gundjeihmi Aboriginal Corporation] Now, a team of researchers, including a faculty member and seven students from the University of Washington, has found and dated artifacts in northern Australia that indicate humans arrived there about 65,000 years ago -- more than 10,000 years earlier than previously thought. A paper published in the journal Nature describes dating techniques and artifact finds at Madjedbebe, a longtime site of archaeological research, that could inform other theories about the emergence of early humans and their coe...

Large, robust, lens-shaped microfossils from the approximately 3.4 billion-year-old Kromberg Formation of the Kaapvaal Craton in eastern South Africa are not only among the oldest elaborate microorganisms known, but are also related to other intricate microfossils of the same age found in the Pilbara Craton of Australia, according to an international team of scientists. Lenticular organic microfossils in the Kromberg Formation, Onverwacht Group, Barberton Mountain Land of South  Africa. Image shown is an optical photomicrograph of a polished thin section, taken in transmitted light  [Credit: Dorothy Oehler/Maud Walsh (Louisiana State University)] The researchers report that the "Kromberg Formation (KF) forms are bona fide, organic Archean microfossils and represent some of the oldest morphologically preserved organisms on Earth," in the July issue of Precambrian Research . They also state that the combination of morphology, occurrence and carbon isotope values argues that the...

When and how the first humans made their way to Australia has been an evolving story. While it is accepted that humans appeared in Africa some 200,000 years ago, scientists in recent years have placed the approximate date of human settlement in Australia further and further back in time, as part of ongoing questions about the timing, the routes and the means of migration out of Africa. Excavations through many layers at the site [Credit: Dominic O Brien/Gundjeihmi Aboriginal Corporation] Now, a team of researchers, including a faculty member and seven students from the University of Washington, has found and dated artifacts in northern Australia that indicate humans arrived there about 65,000 years ago -- more than 10,000 years earlier than previously thought. A paper published in the journal Nature describes dating techniques and artifact finds at Madjedbebe, a longtime site of archaeological research, that could inform other theories about the emergence of early humans and their coe...

Large, robust, lens-shaped microfossils from the approximately 3.4 billion-year-old Kromberg Formation of the Kaapvaal Craton in eastern South Africa are not only among the oldest elaborate microorganisms known, but are also related to other intricate microfossils of the same age found in the Pilbara Craton of Australia, according to an international team of scientists. Lenticular organic microfossils in the Kromberg Formation, Onverwacht Group, Barberton Mountain Land of South  Africa. Image shown is an optical photomicrograph of a polished thin section, taken in transmitted light  [Credit: Dorothy Oehler/Maud Walsh (Louisiana State University)] The researchers report that the "Kromberg Formation (KF) forms are bona fide, organic Archean microfossils and represent some of the oldest morphologically preserved organisms on Earth," in the July issue of Precambrian Research . They also state that the combination of morphology, occurrence and carbon isotope values argues that the...