articles

The biological formation of neurotoxic methyl mercury is an enigmatic process underpinning mercury-related health and environmental hazards. Nevertheless, the exact mechanisms and the factors controlling the process are still not well understood.

In a collaborative effort, researchers at Uppsala and Umeå University now show that the formation of methylmercury in sediment is controlled by the molecular composition of the organic matter. The study has been published in Nature Communications.

Ed Rivero-Valentin grew up in Arecibo, Puerto Rico, less than 15 minutes away from the jungle home of a 1,000-foot-wide radio telescope. When he was four or five, his parents brought him to the observatory for the first time. He saw the telescope’s mesh dish, resting inside a huge sinkhole in the soft rock formations that shape the region. If he had walked around the Arecibo radio telescope’s dish, he would have clocked more than a mile.

In the mid-20th century, when the LP was the medium of choice, massive hydraulic-powered vinyl pressing machines—manufactured by long-forgotten companies like SMT, Lened, and Toolex—pumped out the endless stream of grooved discs that became the lifeblood of the booming post-war music industry.

Geographer Tim DeVries and colleagues determine why the ocean has absorbed more carbon over the past decade.

A brown cloud of air pollution now frequently shrouds much of northern India. It’s a growing regional health and environmental problem, and scientists are working to understand its many causes, which range from the burning of agricultural waste to auto emissions.