Final answer:
Humans expanded widely out of Africa for the first time sometime close to 2 Ma. They migrated within and out of Africa, settling parts of Europe, Asia, and eventually Australia. The last major continental settlement was North and South America.
Step-by-step explanation:
Humans expanded widely out of Africa for the first time sometime close to 2 Ma (million years ago). The earliest hominins migrated within and out of Africa, settling parts of Europe, Asia, and eventually Australia, adapting to their new environments and diversifying biologically as a species. The last major continental settlement was North and South America. Archaeological evidence shows early human occupations in the Americas as early as 18,000 years ago.