The history of the Arabian Peninsula goes back to the beginnings of human habitation in Arabia up to 130,000 years ago. However, a Homo sapiens fossilized finger bone was found at Al Wusta in the Nefud Desert, which indicates that the first human migration out of Africa to Arabia might date back to approximately 90,000 years ago. Nevertheless, the stone tools from the Middle Paleolithic age along with fossils of other animals discovered at Ti's al Ghadah, in northwestern Saudi Arabia, might imply that hominids migrated through a Green Arabia between 300,000 and 500,000 years ago. Acheulean tools found in Saffaqah, Riyadh Region reveal that hominins lived in the Arabian Peninsula as recently as 188,000 years ago.