There are different theories about where the ancestors of the Arabian originally lived. Most evidence suggests the proto-Arabian came from the area along the northern edge of the Fertile Crescent. Another hypothesis suggests the southwestern corner of the Arabian peninsula, in modern-day Yemen, where three now-dry riverbeds indicate good natural pastures existed long ago, perhaps as far back as the Ice Age. This hypothesis has gained renewed attention following a 2010 discovery of artifacts dated between 6590 and 7250 BCE in Al-Magar, in southwestern Saudi Arabia, that appeared to portray horses.