^toraci.•Three new species of thread snakes of the genus Leptotyphlops are described from Hispaniola as: L. calypso from the Samaná Peninsula, and L. asboîepis from the Sierra Martin Garcia, Dominican RepubUc, and L. leptepileptus from the Massif de la Selle, Haiti. These three species together with L. bilineatus and L. pyrites form a distinct group of Leptotyphlops that is restricted to the We...

The response of the ocean redox state to the rise of atmospheric oxygen about 2.3 billion years ago (Ga) is a matter of controversy. Here we provide iron isotope evidence that the change in the ocean iron cycle occurred at the same time as the change in the atmospheric redox state. Variable and negative iron isotope values in pyrites older than about 2.3 Ga suggest that an iron-rich global ocea...

Pyrite is a common sulfide mineral in gold deposits, and its unique thermoelectricity has received extensive attention the field of exploration. However, there still lack detailed research direct evidence about how impurity elements affect semiconductor properties. In this paper, combined with first-principles calculations, laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS)...