Where did big species arrive from?

Answer 1

Big species, or megafauna, typically evolved in various regions around the world, often adapting to their specific environments. For example, many large mammals in North America and Eurasia evolved from ancestors in Africa, where early mammals diversified. Similarly, Australia has its own unique lineage of large species, such as kangaroos and wombats, that evolved independently. Climate changes and geological events also played significant roles in their migration and distribution across continents.