Can the Sahara Desert be green again?

Weather of Arabia - After the end of the last ice age, and at some time between 11,000 - 5,000 years ago, the Sahara Desert changed, as green plants grew over sand dunes and increased rainfall until barren caves turned into lakes, covering about 9 million square kilometers of North Africa in color Green, the flowering plants attracted some animals such as; Hippopotamuses, antelopes, elephants and some types of livestock. However, this fertile paradise is long gone, so can it return?