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.
The sovereignty dispute column indicates states whose sovereignty is undisputed (190 states) and states whose sovereignty is disputed (16 states, out of which there are 6 member states, 1 observer state and 9 other states).