Fracking or hydraulic fracturing is a method utilized by oil and gas companies to increase production of oil or gas from a well that would otherwise exhibit a low flow rate usually due to the geologic rock formation being too dense to allow for the economic recovery of hydrocarbons.
The Vikings lived in Scandinavia (mainly Norway, Sweden and Denmark), and in Iceland. They ventured (and proliferated) as far as Italy and the Mediterranean, but more commonly sailed to Ireland, Northern France, England, and even North America. Norway, Sweden, Denmark.
The Vikings homeland was Scandinavian. Scandinavian consisted of three major countries Denmark, Norway, and Sweden. Each country extended their power into Europe, and effected three different areas giving them the largest trade network of the time. The Danish Vikings extended to the Eastern coast of England, and the western coast of Europe. They made raids that extended to Spain, the Mediterranean, and Northern Africa. In England they formed the towns of Dublin and York. The Swedish Vikings began to explore, trade, and raid Eastern Europe and Russia. They had economic influence in the Black Sea, the Caspian, and Eastern Mediterranean.