Here is a question about this article: William Champion's brother, John, patented a process in 1758 for calcining zinc sulfide into an oxide usable in the retort process. Prior to this, only calamine could be used to produce zinc. In 1798, Johann Christian Ruberg improved on the smelting process by building the first horizontal retort smelter. Jean-Jacques Daniel Dony built a different kind of horizontal zinc smelter in Belgium, which processed even more zinc. Italian doctor Luigi Galvani discovered in 1780 that connecting the spinal cord of a freshly dissected frog to an iron rail attached by a brass hook caused the frog's leg to twitch. He incorrectly thought he had discovered an ability of nerves and muscles to create electricity and called the effect "animal electricity". The galvanic cell and the process of galvanization were both named for Luigi Galvani and these discoveries paved the way for electrical batteries, galvanization and cathodic protection.
What is the answer to this question: Who first patented the process that creates an oxide usable in the retort process?
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So... William Champion's brother, John,


Here is a question about this article: Bird migration is the regular seasonal movement, often north and south along a flyway, between breeding and wintering grounds. Many species of bird migrate. Migration carries high costs in predation and mortality, including from hunting by humans, and is driven primarily by availability of food. It occurs mainly in the northern hemisphere, where birds are funnelled on to specific routes by natural barriers such as the Mediterranean Sea or the Caribbean Sea.
What is the answer to this question: Where does migration mainly occur?
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So... the northern hemisphere


Here is a question about this article: Early in 1953, the French asked Eisenhower for help in French Indochina against the Communists, supplied from China, who were fighting the First Indochina War. Eisenhower sent Lt. General John W. "Iron Mike" O'Daniel to Vietnam to study and assess the French forces there. Chief of Staff Matthew Ridgway dissuaded the President from intervening by presenting a comprehensive estimate of the massive military deployment that would be necessary. Eisenhower stated prophetically that "this war would absorb our troops by divisions."
What is the answer to this question: What was John W. O'Daniel's nickname?
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So...
Iron Mike