Why are mammals able to live throughout the world in a variety of ecosystems?

Mammals have evolved a diverse range of adaptations that allow them to thrive in various ecosystems, including temperature regulation, dietary flexibility, and social behaviors. Their ability to regulate body temperature enables them to inhabit both hot and cold environments, while varied reproductive strategies help them adapt to different ecological niches. Additionally, mammals have developed specialized physical traits and behaviors that allow them to exploit diverse food sources and habitats, contributing to their widespread distribution across the globe.