In a leap forward in the search for a cause of Alzheimer's disease, researchers have discovered that a pinpoint mutation in a single gene can cause this progressive neurological illness.
Under Article IX of the Articles of Confederation, disputes between the states (which mostly involved the settlement of land claims to the west) were settled in a convoluted manner: Congress would name thirty-nine individuals (three from each state) as potential commissioners to resolve the dispute.
Federal courts are established under the U.S. Constitution to decide disputes involving the Constitution and laws passed by Congress. The differences between federal and state courts are defined mainly by jurisdiction. Jurisdiction refers to the kinds of cases a court is authorized to hear.