For years, the outlook for coral reefs has been increasingly bleak. Mass coral bleaching events caused by severe marine heatwaves have fueled repeated warnings that reefs are rapidly on an irreversible path of decline. But new research is challenging that narrative. In a landmark study unveiled Tuesday, scientists have identified more than 64,000 square miles […]

MAJURO, Marshall Islands—Perched on the bow of an aluminum landing craft, Anne Cohen gazed a few yards ahead of the vessel toward a yellow robot gliding across the emerald Majuro lagoon. The unmanned surface vehicle, called Yellowfin, was quickly becoming one of the coral researcher’s most dependable guides in these Central Pacific waters. “She’s the […]