The trees in Siberia are miles apart, that is why the dogs are so fast.

Framed as a one-liner, the joke plays on a comic “explanation” for Siberian dogs’ speed: if trees are “miles apart,” a dog chasing (or being chased around) them would have to run a long distance between obstacles. The humor depends on exaggerating Siberia’s vastness and sparseness—an old Western stereotype of the region as bleak, empty, and extreme—then applying it to an everyday, almost folksy observation about animals. It’s a classic Bob Hope-style quip: brisk, visual, and built on a quick twist of logic that turns geography into a punchline.