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Selenium was not identified as an element until 1818 because it is a trace element found in a limited number of ores and does not occur in its pure form in nature. Its discovery was also hindered by its similarity to tellurium, another element with similar chemical properties, which made it difficult to separate them. Additionally, advancements in analytical chemistry techniques were necessary for its isolation and identification.

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When was James Prescott Joule born?

James Prescott Joule was born on December 24, 1818.


How was the conflict resolved when the US and Britain both claimed Oregon?

The Oregon Treaty of 1846 resolved the conflict between the US and Britain over Oregon. The treaty established the border between the US and British territory at the 49th parallel, allowing for joint occupancy of the Oregon Country for 10 years until the US gained sole control.


Who lived in the Red River Basin in 1818?

In 1818, the Red River Basin was home to various Indigenous tribes, including the Dakota Sioux and Ojibwe, as well as European fur traders and settlers from the Hudson's Bay Company and the North West Company. This region was a significant area for fur trade and cultural exchange between Indigenous peoples and European colonizers.


When did the metric system originate?

The metric system originated in late 18th-century France during the French Revolution. It was officially introduced in 1799 with the establishment of the International System of Units (SI).


What were the rules about dissecting bodies in 1818?

In 1818, the rules regarding dissecting bodies were heavily influenced by legal and ethical considerations. Dissection was primarily reserved for the study of executed criminals, as grave robbing for anatomical study was illegal and socially condemned. Medical schools often relied on the bodies of those who had been convicted of serious crimes, and the practice was tightly regulated to prevent abuse. Public sentiment was generally against dissection, which created a stigma around the practice and limited its acceptance within society.