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Products from aluminum, copper, bronze, and brass on a white background. (metals)

Why Are Some Metals More Conductive than Others?

Abstract vector hi speed internet technology background

History of Technology Timeline

Discover

New Zealand. Political/Physical map. Includes locator.

Where Is “Old Zealand”?

Hemp (Cannabis sativa).

9 Mind-Altering Plants

Rural Irish landscape, Sligo, Ireland.

Why Is Ireland Two Countries?

Close up of books. Stack of books, pile of books, literature, reading. Homepage 2010, arts and entertainment, history and society

12 Novels Considered the “Greatest Book Ever Written”

Ahura Mazda - relief of the Zoroastrian god Ahura Mazda at the ancient ruins of Persepolis in Iran. Also known as Ormazd Zoroastrianism,

Which Religion Is the Oldest?

Two chicks near an egg with a white background (poultry, chick, chickens, birds).

What Do Eggs Have to Do with Easter?

Battle of the Alamo from "Texas: An Epitome of Texas History from the Filibustering and Revolutionary Eras to the Independence of the Republic, 1897. Texas Revolution, Texas revolt, Texas independence, Texas history.

6 Wars of Independence

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process metallurgy iron processing niobium processing alloy hydrometallurgy ingot flux liquation crucible pyrometallurgy

Key People

Johan Vogt

Johan Herman Lie Vogt

Norwegian geologist