Research across 21,439 river reaches links climate warming to sustained oxygen decline, raising concerns for freshwater health globally.

A UAE-mediated exchange freed 410 captives as Russia and Ukraine returned 205 prisoners each in the latest confirmed wartime swap.

PM Modi began his UAE visit in Abu Dhabi after Sheikh Mohamed received him for talks focused on trade, investment, energy and regional issues.

Trump and Xi ended Beijing talks after the White House called their meeting good, with trade, Iran and Taiwan still central to ties.