Ice melange, a slushy mixture of snow and ice chunks, can heal large rifts in Antarctica's ice shelves. Researchers at the University of California, Irvine and NASA's Jet Propulsion Laboratory found that a thinning of ice melange may have enabled a Delaware-sized iceberg to break off from the Larsen C ice shelf in 2017. A new paper in PNAS has the scientists' analysis of the dynamics behind large iceberg calving events.

Nine articles explore the impacts of ancient human societies on tropical ecosystems, revealing the importance of incorporating the paleosciences, social sciences and indigenous traditional knowledge in the development of solutions for contemporary environmental challenges

Researchers describe how withdrawal from nicotine, methamphetamine and cocaine alters the functional architecture and patterns in the brains of mice, compared to control animals, a key to developing addiction treatments.

Zeroing in on specific brain regions when studying drug and alcohol abuse simplifies research but may leave out important insights. In fact, the landscape of the entire brain reorganizes during withdrawal, potentially hindering communication between regions, according to new research in mice published in eNeuro.