In Mount Pulaski, Illinois, it is illegal for boys (and only boys) to hurl snowballs at trees. However, girls are allowed to hurl snowballs at trees.
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Before Abraham Lincoln was elected president he served in the Illinois legislature and practiced law in Springfield. Abraham Lincoln is buried just outside Springfield at Lincoln Tomb State Historic Site.
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On December 2, 1942 in Illinois, Enrico Fermi and a small band of scientists and engineers demonstrated that a simple construction of graphite bricks and uranium lumps could produce controlled heat.