New research co-led by Cornell University examines thousands of years of Arctic sled dog ancestry and reveals when and how Siberian and Alaskan sled dogs’ DNA mixed. New research co-led by Cornell University examines thousands of years of Arctic sled dog ancestry and reveals when and how Siberian and Alaskan sled dogs’ DNA mixed. Plants & Animals Molecular & Computational biology Phys.org – latest science and technology news stories