Final answer:
Homo erectus was the first hominin species to migrate out of Africa in large numbers, with fossils found across Eurasia and Asia. They displayed both physical and behavioral similarities with modern humans, which aided their adaptation and survival in new environments.
Step-by-step explanation:
Homo erectus was the first hominin to migrate out of Africa in large numbers. This species, which emerged approximately 1.8 million years ago, is believed to be the first to leave the African continent, moving into Eurasia and eventually reaching regions as distant as Asia. Evidence of H. erectus has been found in various locations, including India, China, Java, and Europe, highlighting their extensive migratory patterns. H. erectus had many similarities with modern humans, such as a larger brain size, reduced sexual dimorphism, and the utilization of tools and fire. Their ability to adapt to various environmental conditions played a crucial role in their migration, allowing them to hunt, gather, and survive in diverse habitats.