Original: They have also found great popularity among ranchers of the American Southwest, testament to the hardiness of the breed; while originating in cool, moist Britain, they have proven to thrive in much harsher climates on nearly every continent.
Simplified: This is a testament to the hardiness of the breed; while originating in cool, moist Britain, they have thrived in much harsher climates. The breed has adapted to a wide range of climates on nearly every continent.