Sedimentary rocks from Grand Canyon, USA, show evidence for widespread anoxic and sulfidic waters 750 million years ago. "We have investigated the cycling of molybdenum (Mo) in ancient oceans by studying the elemental and isotopic composition of Mo in sedimentary rocks from Grand Canyon that formed in the oceans 750 million years ago", explains Tais W. Dahl, who did this research in collaboration with researchers from Arizona State University, Harvard University and the Nordic Center of Earth Evolution in Denmark (NordCEE).

Scientists have discovered more about the intricacies of the immune system in a breakthrough that may help combat viral infections such as HIV.

Women with cancer-causing strains of human papillomavirus (HPV) may be at increased risk for cardiovascular disease (CVD) and stroke even when no conventional risk factors for CVD are present.

A study by researchers at the University of Mississippi Medical Center and the University of California, San Francisco shows that rats given a popularly prescribed antidepressant during development exhibit brain abnormalities and behaviors characteristic of autism spectrum disorders.