The rare-earth elements (REE), also called rare-earth metals, or rare earths, are a set of 17 nearly indistinguishable lustrous silvery-white soft heavy metals. The 15 lanthanides (or lanthanoids), along with scandium, and yttrium, are usually included as rare earths.

The economic history of the United States spans the colonial era through the 21st century. The initial settlements depended on agriculture and hunting/trapping, later adding international trade, manufacturing, and finally, services, to the point where agriculture represented less than 2% of GDP. Until the end of the…

The Second Industrial Revolution, also known as the Technological Revolution, was a phase of rapid scientific discovery, standardization, mass production and industrialization from the late 19th century into the early 20th century. The First Industrial Revolution, which ended in the middle of the 19th century, was…

American business history is a history of business, entrepreneurship, and corporations, together with responses by consumers, critics, and government, in the United States from colonial times to the present. In broader context, it is a major part of the Economic history of the United States, but focuses on specific…

The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK or U.K.) or Britain, is a sovereign country located off the northwestern coast of the European mainland. It includes the island of Great Britain, the northeastern part of the island of Ireland, and many smaller islands.

The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK or U.K.) or Britain, is a sovereign country located off the northwestern coast of the European mainland. It includes the island of Great Britain, the northeastern part of the island of Ireland, and many smaller islands.

In relation to the Clean Air Act ("CAA" or "Act") of 1963, an Endangerment Finding is an analysis of whether changes to the atmosphere endanger the public. The Act includes a requirement for EPA Administrators to issue rules to set (and from time to time revise) standards for new motor vehicles or new motor vehicle…

Santiago Calatrava Valls (born 28 July 1951) is a Spanish-Swiss architect, structural engineer, sculptor and painter, particularly known for his bridges supported by single leaning pylons, and his railway stations, stadiums, and museums, whose sculptural forms often resemble living organisms. His works include the…

Manufacturing is the creation or production of goods with the help of equipment, labor, machines, tools, and chemical or biological processing or formulation. It is the essence of the secondary sector of the economy.

Gracie Mansion (also known as Archibald Gracie Mansion) is the official residence of the mayor of New York City. Built in 1799, it is located in Carl Schurz Park, at East End Avenue and 88th Street in the Yorkville neighborhood of Manhattan.