Sheep graze on the beach eating seaweed at North Ronaldsay, Orkney on September 7, 2021. On a tiny island in Scotland's Orkneys, thousands of sheep happily munch on seaweed all winter, a unique diet that scientists say offers hope for reducing planet-warming methane emissions. The distinctive native sheep with brown, beige or black wool, learned to survive on the foreshore, eating the most commonly available food: seaweed. (Photo by Adrian Dennis/AFP Photo)
