Glasgow, Scotland (CNN) -- Scotland's voters are heading to the polls Thursday to cast their ballots in a landmark referendum on independence from the United Kingdom.
There, they will face a straightforward yes/no question: Should Scotland be an independent country?
More than 4.2 million people have registered to vote, the largest electorate ever in Scotland, and turnout in the referendum is expected to be high.
A vote for independence would mean Scotland, with its population of about 5.3 million, splits from the rest of the United Kingdom, made up of England, Wales and Northern Ireland.
Voting can take place from 7 a.m. until 10 p.m. local time (2 a.m. to 5 p.m. ET) at more than 5,500 polling stations across 32 districts nationwide, from the remote highlands and islands to the big cities of Edinburgh and Glasgow.