Have you ever noticed a distinct, earthy aroma just before or after a rainfall? This intriguing phenomenon, often referred to as the 'smell of rain,' is more than just a sensory experience; it's a fascinating interplay of science and nature. The term for this scent is 'petrichor,' derived from the Greek words 'petra' (stone) and 'ichor' (the fluid that flows in the veins of the gods in Greek mythology).