Humidity

Humidity is the concentration of water vapor present in the air. Water vapor, the gaseous state of water, is generally invisible to the naked eye. Humidity indicates the likelihood for precipitation, dew, or fog to be present.

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Source: Wikipedia · Image: Wikimedia Commons · CC BY-SA 2.5

DIECASTVAULT

The scale-model shelf — die-cast cars, planes & trains, cataloged and cared for.

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Museum entries, images, and facts are drawn from Wikipedia and Wikimedia Commons, used under public-domain and Creative Commons licenses.