Water has no odor : What’s making the rain smell ?

The scientists at the Massachusetts Institute of Technology (MIT) conducted roughly 600 experiments and found out why they believe rain brings forth that lovely perfume. By using high-speed cameras to observe raindrops as they hit various porous surfaces, they discovered that small air bubbles become trapped under the drops upon impact, rise up to the surface, and then escape into the surrounding air. It’s in the released air that we’ll find the root of the scent. The scientists at MIT suspect that in natural environments, petrichor, the scent that we associate with rain, also gets swept up into the droplets along with the bacteria and viruses one normally finds in soil. Once the rain releases its air, the contents can then be spread through gusts of wind, allowing us to smell the rain. Read more on Mother Nature Network

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