This is correct. Its a proven Biological Fact! Look at it this way. Have you ever seen a tall skinny escimo, or a short fat ethiopian? All about the surface area to volume ratio.
Proven? Where?
Shuter just posted a biological report from Canada saying Bergman's is invalid.
So, is it invalid or does your questionable Eskimo-Ethiopian theory hold water?
Giraffes are close to the equator. They're gigantic.
Elephants are close to the equator. They're enormous.
Dik-Diks are close to the equator. They're so small they could be crammed in an overhead bag for airline travel.
Why aren't penguins the size of cows? They're at the poles and must combat the weather. Bergman's would, theoretically, mean we would have penguins that look like NFL linebackers.