Roth can evoke an unknown place and time with an exactness of sensory detail that is particularly alive to sounds and to changing light.

ECONOMIST: Modern fiction

Now, we've already given our opinions on using GPS technology like this and, while it's unknown whether these agents had a warrant to place this device, the 9th US Court of Appeals recently made one unnecessary for this sort of thing.

ENGADGET: American student finds GPS tracker stuck to car, FBI shows up to reclaim its 'federal property'

As governments and companies place their bets, perhaps the biggest unknown is which technologies will win.

WSJ: Green Technologies Begin to Play Key Role in Global Economic Fight

However, whether the same processes take place in people or other animals is unknown.

BBC: Light in womb 'gives healthy eyes' - in mice

The cause of Mr Brockhurst's death remained unknown and a post-mortem examination will take place early next week, police added.

BBC: Timothy Brockhurst

Unlike newspapers though, which are of unknown origin, each track in Undersound will have a birth-place, giving added meaning.

ENGADGET: Undersound, a way to trade music on the London Underground

The theft took place on the final day of an exhibition entitled "Unknown Treasures, " which had featured prints and etchings by Albrecht Duerer and Rembrandt van Rijn.

CNN: Picasso, Mondrian works stolen in Athens art heist

Whether that has taken place, and if so on what scale, is still unknown, but the signs are ominous.

ECONOMIST: Victim of Serbia--or NATO?

Given the unknown depth, and length, of the recession, none of these stocks is a place to park money short term.

FORBES: Magazine Article

Englishman David Lynn, a definite unknown, carded a 68, tying him with a 53-year-old Fred Couples for third place as twilight fell.

WSJ: Guan Tianlang: A Schoolboy Steals Day One of the Masters