Migration to the Americas. Diagram showing the three theories (arrowed) for when and how humans first arrived in the Americas. The central arrow shows migration from Asia along an ice-free corridor through Alaska and Canada 15,000 years ago. The arrow at left shows humans from Asia sailing along an ice-free region south of Alaska to reach the western coast of North America. The third arrow right) shows Europeans crossing the Atlantic,possibly some 20,000 years ago | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Lunau, Claus |
Bildgröße: | 4193 px × 4193 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |