Complex sentence: During the last ice age which caused the water levels it is believed that many migrated across the Red Sea from the Fagal are to what is now Bab al Mandab in Yemen and was a likely landing ground for many people arriving in Africa from the Middle East.
Split into simpler sentences: During the last ice age which caused the water levels it is believed that many migrated across the Red Sea from the Fagal are to what is now Bab al Mandab in Yemen. Similarly it was a likely landing ground for many people arriving in Africa from the Middle East.