The conversation between human and AI assistant.
What is the Sahara, and how do the average temperatures there compare to the ones in the Antarctica?
Is it true that the Sahara used to be a green oasis?
Yes, it is believed that the Sahara was once a green oasis that supported plant and animal life. However, changes in the earth's climate caused the region to become drier and hotter, leading to the desertification of the area.