Signs of winter

A woman waits at a bus stop during snowfall in Edinburgh, Scotland December 6, 2010. REUTERS/David Moir

A man snowboards as freezing temperatures and heavy snow continue to cause chaos, in Glenravel Glen, 50 miles (80 km) north of Belfast, December 4, 2010. REUTERS/Cathal McNaughton

A starling perches on the back of a sheep as freezing temperatures and heavy snow continues to cause chaos, in Glenravel Glen, 50 miles (80 km) north of Belfast, December 4, 2010 REUTERS/Cathal McNaughton

Melting snow is seen against the sky through the skylight of a house in Vienna December 4, 2010. REUTERS/Heinz-Peter Bader

Five-month old African elephant calf Tuluba follows his mother Numbi in their snow coverd enclosure in Schoenbrunn zoo in Vienna, December 4, 2010. REUTERS/Leonhard Foeger

A worker removes snow from the pitch just before the French Ligue 1 soccer match was cancelled by the referee at Lille Metropole Stadium in Villeneuve d'Ascq December 4, 2010. REUTERS/Pascal Rossignol

A man takes a picture of the snow-covered town of Burgos, northern Spain, December 3, 2010. REUTERS/Felix Ordonez

A sledger's boots are visible in an explosion of snow during an attempt to jump a ramp at the Queen Elizabeth country park near Petersfield in southern England December 3, 2010. REUTERS/Luke MacGregor

A dog waits in the snow in downtown Burgos, northern Spain, December 3, 2010. REUTERS/Felix Ordonez

Jude Veitch sits in a plastic bag as his brother Morgan pulls him across the snow at the Queen Elizabeth country park near Petersfield in southern England December 3, 2010. REUTERS/Luke MacGregor

A worker removes snow from the soccer pitch prior to the Europa League Group A soccer match between Rapid Vienna and Porto in Vienna December 2, 2010. REUTERS/Herwig Prammer

Youths throw snowballs in Stamford Bridge, northern England December 2, 2010. REUTERS/Nigel Roddis

Sheep stand in a snow covered field in Burton Grange, northern England December 3, 2010. REUTERS/Nigel Roddis

A lone tree is seen in the fog on a snow covered field in Rubigen, near Bern, Switzerland December 2, 2010. REUTERS/Michael Buholzer

A municipal guard officer pushes his car on a snowy road in Poznan, western Poland December 2, 2010. REUTERS/Kacper Pempel

A street performer dressed as the character Darth Vader from the film 'Star Wars' stands in front of the Brandenburg Gate during snowfall in Berlin, December 2, 2010. REUTERS/Pawel Kopczynski

A swimmer enters the Serpentine lake in Hyde Park in central London December 2, 2010. REUTERS/Toby Melville

Vehicles travel along the snow-covered highway A6 in Bern December 1, 2010. REUTERS/Michael Buholzer

A sheep is seen covered in snow in a field near Middleham, northern England December 1, 2010. REUTERS/Nigel Roddis

A freerunner performs a stunt on a street lantern in 'Burggarten' park while it is snowing in Vienna December 1, 2010. REUTERS/Lisi Niesner

A Parks Police officer takes photographs of a snowman in Richmond Park in south west London December 1, 2010. REUTERS/Toby Melville

Blowing snow and freezing temperatures face drivers as they head west on Highway 1 from Calgary, Alberta November 29, 2010. REUTERS/Mike Blake

A time exposure photograph shows a tree in front of the snow covered Bernese alps and the city of Thun (L) in Oberbuetschel, near Bern, November 30, 2010. REUTERS/Michael Buholzer

A horseman rides a horse between snow covered fields in Muehlethurnen, near Bern November 26, 2010. REUTERS/Michael Buholzer

Reflections of snow covered trees are seen in a lake near Sutton Bank, northern England, November 26, 2010. REUTERS/Nigel Roddis

A snow covered car is seen at Boroughbridge, northern England, November 25, 2010. REUTERS/Nigel Roddis

A groom carries his bride as they celebrate their wedding in the snow at Dvortsovaya Square in central St. Petersburg November 25, 2010. REUTERS/Alexander Demianchuk

Balkar men, dressed in national clothes, feed pigeons as they take part in a protest rally during a heavy snowfall in central Moscow, October 29, 2010. REUTERS/Denis Sinyakov

A couple walk through snow on Calton Hill in Edinburgh, Scotland November 28, 2010. REUTERS/David Moir

Snow covers a telephone box in Crathie, in Scotland November 24, 2010. REUTERS/Russell Cheyne

A fisherman casts his line in Moscow River, covered in frosty fog, with the air temperature at about -13 degrees Celsius (8.6 degrees Fahrenheit) in Moscow November 29, 2010. REUTERS/Denis Sinyakov

Duncan Wilson, a tartan salesperson, clears the snow away from the front of his store in Edinburgh, Scotland November 28, 2010. REUTERS/David Moir

A bus drives past icicles which have formed on a sculpture in central Dublin November 29, 2010 REUTERS/Cathal McNaughton

Pedestrians walk as snow falls in Bern, Switzerland, November 26, 2010. REUTERS/Michael Buholzer

A leaf is seen on snow covered ground in Helmsley, northern England, November 26, 2010. REUTERS/Nigel Roddis

Deer stand in Richmond Park in south west London November 28, 2010. REUTERS/Paul Hackett

A couple stand in Heldenplatz (Heroes' square) during the first snowfall of this season in Vienna November 28, 2010. REUTERS/Lisi Niesner