Eureka (word) "Eureka! Eureka!" after he had stepped into a bath and noticed that the water level rose, whereupon he suddenly understood that the volume of water displaced must be equal to the volume of the part of his body he had submerged. (This relation is "not" what is known as Archimedes' principle—that deals with the "upthrust" experienced by a body immersed in a fluid.) He then realized that the volume of irregular objects could be measured with precision, a previously intractable problem. He is said to have been so eager to share his discovery that he leapt out of his bathtub
Arcata–Eureka Airport Arcata–Eureka Airport California Redwood Coast – Humboldt County Airport (Arcata Airport) is in Humboldt County, California, north of Arcata and north of Eureka, in McKinleyville, California. The National Plan of Integrated Airport Systems for 2011–2015 categorized it as a "Nonhub primary commercial service" airport. The airport is a federally designated port of entry for civil aircraft arriving in the United States. The airport is the site of the command center for and primary facilities of the United States Coast Guard Air Station Humboldt Bay, which provides rescue and law enforcement for the region north of the San Francisco Bay Area.