From Yemen they went to the Gulf of Arabia which at the time was dry because sea levels were so much lower. The gulf was actually fresh water lakes; it wasn't the gulf as we know it today. So it was a very good place for them to stop. Some of them went all the way round the coast all the way down to Australia and then all the way up the coast to China. Some of them went North of the Himalayas into Central Asia. Some 30,000 years after they got to the Gulf, they then went North into Europe because the weather changed again, opening up a green corridor from where they were in the Gulf up into Turkey. There was some wet weather that greened the desert. this is why they didn't get into Europe until 50,000 years ago.