Requires a URL (per chamber rules): What is a natural process that you think the world should have, but it doesn't?

At the start of every month, places with high humidity light up for 15 minutes and fade into a warm orange glow. The strange part is that the light does not come from the sky but from the atmosphere itself, and the temperature is perfect for staring at it, just above 70 degrees Fahrenheit and just below 22 degrees Celsius.