Small streams make up 70-80 percent of the total channel length of river networks, and they strongly influence downstream portions these networks. The role small streams -- known as headstreams -- play in retaining or transmitting sediment and nutrients, providing habitat and refuge for diverse aquatic and riparian organisms, creating migration corridors, and governing connectivity at the watershed-scale is the subject of a recent review.

Advanced wood-burning stoves designed for use in the developing world can reduce air pollution more than anticipated, because gaseous emissions from traditional wood stoves form more particulate matter in the atmosphere than researchers previously thought.

A specific kind of natural nanoparticles, called low-density lipoproteins (LDL), are fascinating scientists because their modification plays a key role in people affected by high cholesterol and atherosclerosis. LDL from healthy people behaved differently when subjected to high pressure compared to LDL affected by the common diseases studied, according to new research.