"Even nature’s best animal distance runners — such as horses and dogs — will run similar distances only if forced to do so, and the startling evidence is that humans are better at it, Lieberman said. "
That doesn't seem to be true for sled dogs though, who can easily outrun humans over long distances and are very eager to run.
Then again, they've been bred and trained by humans to do that, and they usually run under conditions where overheating is not a problem.
I was thinking the same thing. My sister used to ride a bike with her dog. It could go 20 miles at a fast clip before getting tired. It was in hot weather with a thick coat of fur. Maybe they were good partners in hunting.
That doesn't seem to be true for sled dogs though, who can easily outrun humans over long distances and are very eager to run.
Then again, they've been bred and trained by humans to do that, and they usually run under conditions where overheating is not a problem.