摘要 : Distant ancestors of cobras and sea snakes probably slithered or rafted their way around the world from Asia. The large group of snakes called Elapoidea includes mambas, cobras and coral snakes. Snakes belonging to this group can ... 展开 Distant ancestors of cobras and sea snakes probably slithered or rafted their way around the world from Asia. The large group of snakes called Elapoidea includes mambas, cobras and coral snakes. Snakes belonging to this group can be found in tropical areas all over the world, but where they got their start has been unknown. 收起