Global warming is driving rapid environmental change in the Arctic. "To understand these changes, field measurements that adequately represent environmental variation across the Arctic as a whole are crucial", says PhD student Anna-Maria Virkkala from the University of Helsinki.

Tiny bits of DNA collected from waters off the West Coast allowed scientists to identify more species of marine vertebrates than traditional surveys with trawl nets.

Scientists have discovered what they believe is the world’s oldest known forest — a set of 386-million-year-old fossilized root systems found in an old sandstone quarry in the Catskill Mountains in New York.

More than half of Earth’s rivers freeze over every year.

On frigid days, water vapor in the air can transform directly into solid ice, depositing a thin layer on surfaces such as a windowpane or car windshield.

NASA’s Terra satellite passed over the Southern Pacific Ocean on Dec. 30 and found that Tropical Storm Sarai continued to move further away from Fiji and toward Tonga.

Pregnant women exposed to persistent organic pollutants, or POPs, had slightly smaller fetuses than women who haven’t been exposed to these chemicals, according to an analysis of ultrasound scans by researchers at the National Institutes of Health and other institutions.

Tropical Cyclone Calvinia formed on Dec. 29 and by the next day, its clouds from a band of thunderstorms on its western side had blanketed the island of Mauritius in the Southern Indian Ocean.

As the world warms, a new study is helping scientists understand how cone-bearing trees like pines and junipers may respond to drought.

A study in Botswana by Columbia University Mailman School of Public Health scientists finds that spikes in cases of life-threatening diarrhea in young children are associated with La Niña climate conditions.