Abstract Gold parting enabled the production of very pure gold for various purposes from sixth century BC onwards, but analytical proof this pyrotechnical process is difficult. We describe a new approach identification purified combining silver and copper isotopic with trace element analyses. Parting experiments were performed gold-silver-copper alloys using classical salt cementation to invest...

Introduction: The observed presence of grooves on Eros can be interpreted as being solely due to faulting resulting from the transmission of impact shock waves [1]. However, early studies found two large-scale lineations on Eros (Callisto Fossae and Rahe Dorsum) to be coplanar with a large flat region (the southern " facet ") on one end of the asteroid [2]. This CF-RD-SF plane was interpreted a...

I offer a critical analysis of a view that has become a dominant aspect of recent thought on the relationship between evolution and morality, and propose an alternative. An ingredient in Michael Ruse’s ‘error theory’ (Ruse 1995) is that belief in moral (prescriptive, universal, and nonsubjective) guidelines arose in humans because such belief results in the performance of adaptive cooperative b...

Metamorphic coesite and diamond in the Dabie Shan, eastern China, testify to subduction of continental crust to >100 km depth. Exhumation of these ultrahigh-pressure rocks through the crust encompassed two stages. (1) South-dipping foliation, southeastplunging stretching lineation, lineation-parallel isoclinal folds, and boudins indicate extreme subhorizontal shortening and subvertical extensio...