MUNDANE MYSTERIES: What causes the smell after it rains?

MUNDANE MYSTERIES: What causes the smell after it rains?

We haven’t had a ton of rain this summer, but when we have you probably noticed that distinctive smell that happens once the rain ends. But where does that smell come from? There’s actually a name for it… petrichor. Basically all the oil from various plants falls off and dries on the ground. Then when…