Computer analysis of oxygen levels in the blood during sleep could -- by itself -- provide an easy, relatively inexpensive and sufficiently reliable way to determine which children who snore habitually could benefit from a diagnosis and treatment for obstructive sleep apnea. This approach was most accurate for children with severe apnea.

By the end of this century, temperatures in South Asia — a region where about one-fifth of the world's population lives — could become too hot and humid for people to survive, according to a new study.

Tiny dents in the surface of graphene greatly enhances its potential as a supercapacitor. Even better, it can be made from carbon dioxide in a novel approach. The process uses a heat-releasing reaction to dig micropores into 3-D graphene and could be a useful supercapacitor material.