The conversation between human and AI assistant.
What is the Sahara, and how do the average temperatures there compare to the ones in the Gobi Desert?
That's fascinating. Is the Sahara expanding or shrinking?
The Sahara has been expanding for several decades due to climate change and human activities like deforestation and overgrazing. It's estimated that the Sahara grows by about 0.8 miles (1.3 kilometers) each year.