There, smaller roads have become extremely icy in patches and some have been blocked by jack-knifed lorries or double-deckers stuck in the road.

BBC: Death-trap fear as salt runs low

Watson and Francis Crick's description of DNA's double-helix structure, and in computing, with Jack Kilby's and Bob Noyce's independent inventions of the integrated circuit.

FORBES: Magazine Article

"But eliminating the exemption would primarily hurt the middle manager posted in Asia and double the complexity of the U.S return, " Jack notes.

FORBES: The Other Problem

With a trip to Manchester United looming on Saturday, Wenger made a double change with 19 minutes left, sending on Arshavin and Jack Wilshere for Eduardo and Eboue.

BBC: SPORT | Football | Europe | Arsenal 3-1 Celtic (agg 5-1)

The Parker cellar lies just below the kitchen floor and is accessed by a door decorated with a charming photo of the young Parkers: Pat Parker looked like a double for Natalie Wood, while Mr. Parker looked like Jack Nicholson in his prime.

WSJ: Drinking With Robert M. Parker Jr. | On Wine

This quote from the FT.com encapsulates the key reason why both Jack Weyland and Justin Uyehara have used TWM, a double inverse the Russell 2000 ETF to hedge their portfolios from time to time.

FORBES: Why TWM Makes A Good Hedge