World crosses first major climate tipping point with coral reef collapse - Scientists warn coral ecosystems, on which nearly ...

Some of the longest, most important migrations of species on Earth are happening beneath the surface of the world's rivers and many are rapidly collapsing, according to a major new assessment by the ...

A nuclear-armed nation running out of food, fuel, and options. As Pakistan faces a spiraling debt crisis, energy shortages, and rising extremism, the stakes go far beyond its borders. Could the ...