History gave the glory to Balto, the sled dog whose statue stands in Central Park. But Balto ran only the final 55 miles of the 1925 serum run to Nome. The dog who covered the longest, deadliest 260-mile stretch was a 12-year-old named Togo.

This deep dive corrects a century-old record using the mushers' diaries, 1920s press archives, and canine behavioral science. We trace Togo from sickly, rejected runt to the greatest sled dog in Alaskan history, and explore the difference between crossing the finish line and carrying the real burden of the journey.

• How the rejected runt jumped through a closed glass window and ran miles back to his master's kennel
• The Norton Sound incidents, including a backward somersault that stopped the team inches from open water and fabricating a harness from a broken rope mid-swim
• The fr ...