And yet monkeys and apes managed to move past the Arabian desert to move as far east as Japan and across the Sahara into Morocco and elsewhere in North Africa.

And yet monkeys and apes managed to move past the Arabian desert to move as far east as Japan and across the Sahara into Morocco and elsewhere in North Africa. (While looking to see what the range of old world primates was, I discovered that there are marsupials in Papua New Guinea including something called a Tree Kangaroo.)