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Modern chemistry emerged from the sixteenth through the eighteenth centuries through the material practices and theories promoted by alchemy, medicine, manufacturing and mining. A decisive moment came when 'chymistry' was distinguished from alchemy by Robert Boyle in his work The Sceptical Chymist, in 1661; although the alchemical tradition continued for some time after his work. Other important steps included the gravimetric experimental practices of medical chemists like William Cullen, Joseph Black, Torbern Bergman and Pierre Macquer and through the work of Antoine Lavoisier (Father of Modern Chemistry) on oxygen and the law of conservation of mass, which refuted phlogiston theory. The theory that all matter is made of atoms, which are the smallest constituents of matter that cannot be broken down without losing the basic chemical and physical properties of that matter, was provided by John Dalton in 1803, although the question took a hundred years to settle as proven. Dalton also formulated the law of mass relationships. In 1869, Dmitri Mendeleev composed his periodic table of elements on the basis of Dalton's discoveries.

What book was written by Robert Boyle in 1661?
Answer: The Sceptical Chymist
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In 1837, the personal union of the United Kingdom and Hanover ended because William IV's heir in the United Kingdom was female (Queen Victoria). Hanover could be inherited only by male heirs. Thus, Hanover passed to William IV's brother, Ernest Augustus, and remained a kingdom until 1866, when it was annexed by Prussia during the Austro-Prussian war. Despite being expected to defeat Prussia at the Battle of Langensalza, Prussia employed Moltke the Elder's Kesselschlacht order of battle to instead destroy the Hanoverian army. The city of Hanover became the capital of the Prussian Province of Hanover. After the annexation, the people of Hanover generally opposed the Prussian government.

Who did the throne of Hanover pass to instead of Queen Victoria?
Answer: Ernest Augustus
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The origins of the people of Tuvalu are addressed in the theories regarding migration into the Pacific that began about 3000 years ago. During pre-European-contact times there was frequent canoe voyaging between the nearer islands including Samoa and Tonga. Eight of the nine islands of Tuvalu were inhabited; thus the name, Tuvalu, means "eight standing together" in Tuvaluan (compare to *walo meaning "eight" in Proto-Austronesian). Possible evidence of fire in the Caves of Nanumanga may indicate human occupation for thousands of years.

How many years ago did migrations of people happen in the Pacific area?
Answer:
3000 years