The bison embodies a paradox: immense strength paired with quiet calm. Weighing up to 900 kilogrammes and standing almost 2 metres tall, these giants roam North America"s grasslands and river valleys in mobile herds. Photographed here in Yellowstone National Park, in Wyoming, United States, this herd represents the wild heart of American plains—a reminder of the strength that echoes across the world"s wilderness, from the bison of the west to India"s own gaur.