Final answer:
Homo erectus likely migrated out of Africa to other parts of the world as early as 1.8 million years ago. These migrations were influenced by climate change and the need to follow specific prey.
Step-by-step explanation:
Homo erectus likely migrated out of Africa to other parts of the world. One theory suggests that Homo ergaster, an earlier hominin species, migrated out of Africa around 2 million years ago and eventually evolved into the population of Homo erectus settled in eastern Europe by 1.85 million years ago. Another theory suggests that Homo erectus migrated out of Africa between 1.8 and 1.5 million years ago and reached various regions including North Africa, the Near East, Europe, and East and South Asia over hundreds of thousands of years. These migrations were influenced by factors such as climate change and the need to follow specific prey.