FRIDAY, APRIL 17, 2026

Question: What cooling invention was created in Arizona in 1908 by Oscar Palmer to help people survive the desert heat?

Answer: The evaporative cooler. Also known as a swamp cooler, the invention quickly became essential in Arizona homes. By the 1930s, thousands of homemade units were in use, and by 1936, Phoenix had grown into a major evaporative cooler manufacturing hub.