Learn more about these signs of summertime cold, perhaps tied to volcanic activity in 1877 and 1902.

Learn about a new study of captive chimpanzees, the first to identify the phenomenon of contagious urinations.

Learn what this survey recorded of exocomet belts, which imaged and identified bands of every size.

Learn more about the traits of children who are more likely to be treated better by parents.

Learn more about the sun stones, shale artifacts that were sacrificed at the Neolithic site of Vasagård after a volcanic eruption shaded the Sun.

Learn more about the new computer models that make more targeted antibiotics a possibility.

Learn more about the predicted prevalence of dementia, which is projected to increase with the aging U.S. population.