Here's why:
* Mammals are warm-blooded: Snow monkeys are mammals, and all mammals are warm-blooded.
* Internal temperature regulation: This means they can maintain a relatively stable internal body temperature regardless of the external environment.
* Adaptations for cold: They have several adaptations that help them stay warm in the cold, like thick fur, a layer of subcutaneous fat, and the ability to shiver.
So, even though they live in snowy environments, snow monkeys are well-equipped to stay warm thanks to their warm-blooded nature.