Petrichor: why does rain smell so good?
It turns out it's not just gratitude that makes rain smell so appealing after a long period of dry weather. There's actually some chemistry involved too. Bacteria, plants and even lightning can all play a role in the pleasant smell we experience after a thunderstorm; that of clean air and wet earth. Known as petrichor, the scent has long been chased by scientists and even perfumers for its enduring appeal. Wet earth First named by two Australian researchers in the 1960s, the warm, earthy fragrance we experience when rain hits dry ground is produced by bacteria. Image copyrightSCIENCE ...