Researchers are blending archaeology and geochemistry to get a more complete picture of turquoise's mining and distribution in the pre-Hispanic Southwest.
For her Ph.D., Viglietti studied the fossil-rich sediments present in the Karoo, deposited during the tectonic events that created the Gondwanides, and found that the vertebrate animals in the area started to either go extinct or become less common much earlier than what was previously thought.
Did volcanic eruptions in the planet's high northern latitudes play a role in causing violent rebellions in Ancient Egypt? A new study suggests that the answer is yes. Researchers examined a range of evidence -- from climate records to papyri -- finding a close link between eruptions and political unrest in the Ptolemaic era. The connection comes from the capacity of volcanoes to cool the atmosphere, which can, in turn, disrupt the flow of the Nile River.
The biological makeup of humans in East Asia is shaping up to be a very complex story, with greater diversity and more distant contacts than previously known, according to a new study analyzing the genome of a man that died in the Tianyuan Cave near Beijing, China 40,000 years ago. His bones had enough DNA molecules left that a team led by Professor FU Qiaomei could use advanced ancient DNA sequencing techniques to retrieve DNA from him that spans the human genome.
New paleogenomic research conducted by an international team led by UC Santa Cruz appears to rule out the likelihood that inhabitants of Easter Island intermixed with South Americans prior to the arrival of Europeans on the island in 1722.
Gold has long been valued for its luxurious glitter and hue, and threads of the gleaming metal have graced clothing and tapestries for centuries. Determining how artisans accomplished these adornments in the distant past can help scientists restore, preserve and date artifacts, but solutions to these puzzles have been elusive. Now scientists, reporting in ACS' journal Analytical Chemistry, have revealed that medieval artisans used a gilding technology that has endured for centuries.
Mass extinctions were followed by periods of low diversity in which certain new species dominated wide regions of the supercontinent Pangaea, reports a new study.
A new species of ichthyosaur has been identified from a fossil that has been in the University of Nottingham's engineering collection for over half a century.
Amazonian farmers discovered how to manipulate wild rice so the plants could provide more food 4,000 years ago, long before Europeans colonized America, archaeologists have discovered.
The study, reported in the journal Science, examined genetic information from the remains of anatomically modern humans who lived during the Upper Palaeolithic, a period when modern humans from Africa first colonised western Eurasia. The results suggest that people deliberately sought partners beyond their immediate family, and that they were probably connected to a wider network of groups from within which mates were chosen, in order to avoid becoming inbred.