This undated photo provided by the journal Nature shows a view from a rock above Denisova cave to the excavation field camp in in Altai Mountains of southern Siberia. Scientists have decoded DNA from a human ancestor that lived in Siberia 30,000 to 50,000 years ago — possibly a new member of the human family tree. (AP Photo/Nature, Johannes Krause)

This undated photo provided by the journal Nature shows a view from a rock above Denisova cave to the excavation field camp in in Altai Mountains of southern Siberia. Scientists have decoded DNA from a human ancestor that lived in Siberia 30,000 to 50,000 years ago — possibly a new member of the human family tree. (AP Photo/Nature, Johannes Krause)

Three unidentified women painted in colors of the Canadian flag hold a banner as they take part in PETA (People for the Ethical Treatment of Animals) picket in downtown St. Petersburg, Russia, Wednesday, March 17, 2010. PETA members are protesting against the seal cull in Canada. The temperature in St. Petersburg is −15°C. (AP Photo/Dmitry Lovetsky)

Three unidentified women painted in colors of the Canadian flag hold a banner as they take part in PETA (People for the Ethical Treatment of Animals) picket in downtown St. Petersburg, Russia, Wednesday, March 17, 2010. PETA members are protesting against the seal cull in Canada. The temperature in St. Petersburg is −15°C. (AP Photo/Dmitry Lovetsky)

In this Saturday March 13, 2010 photo people watch goose fighting in the city of Pavlovo in the Nizhny Novgorod region, some 380 km (236 miles) east of Moscow. (AP Photo)

In this Saturday March 13, 2010 photo people watch goose fighting in the city of Pavlovo in the Nizhny Novgorod region, some 380 km (236 miles) east of Moscow. (AP Photo)

A man emerges from cold water after plunging into an icy pond to mark the upcoming Epiphany in Kuzminki park in southeastern Moscow, Russia, Monday, Jan. 18, 2010. Thousands of Russian Orthodox Church followers plunged Monday into icy rivers and ponds across the country to mark the upcoming Epiphany, cleansing themselves with water deemed holy for the day. Water that is blessed by a cleric on Epiphany is considered holy and pure until next year’s celebration, and is believed to have special powers of protection and healing. The Russian Orthodox Church follows the old Julian calendar, according to which Epiphany falls on Jan. 19. Moscow temperatures on Monday morning dropped to −20° C (-4° F). (AP Photo)

A man emerges from cold water after plunging into an icy pond to mark the upcoming Epiphany in Kuzminki park in southeastern Moscow, Russia, Monday, Jan. 18, 2010. Thousands of Russian Orthodox Church followers plunged Monday into icy rivers and ponds across the country to mark the upcoming Epiphany, cleansing themselves with water deemed holy for the day. Water that is blessed by a cleric on Epiphany is considered holy and pure until next year’s celebration, and is believed to have special powers of protection and healing. The Russian Orthodox Church follows the old Julian calendar, according to which Epiphany falls on Jan. 19. Moscow temperatures on Monday morning dropped to −20° C (-4° F). (AP Photo)

St. Peter and St. Poul Cathedral are seen in St. Petersburg, Russia, late Sunday, Jan. 10, 2010. The region’s temperatures on Sunday dropped to -20° C (-4° F). (AP Photo/Dmitry Lovetsky)

St. Peter and St. Poul Cathedral are seen in St. Petersburg, Russia, late Sunday, Jan. 10, 2010. The region’s temperatures on Sunday dropped to -20° C (-4° F). (AP Photo/Dmitry Lovetsky)

The Winter Palace is seen in St. Petersburg, Russia, late Sunday, Jan. 10, 2010. the region’s temperatures on Sunday dropped to -20° C (-4° F). (AP Photo/Dmitry Lovetsky)

The Winter Palace is seen in St. Petersburg, Russia, late Sunday, Jan. 10, 2010. the region’s temperatures on Sunday dropped to -20° C (-4° F). (AP Photo/Dmitry Lovetsky)

People walk along Red Square with St. Basil’s Cathedral seen through the mist and snow in background, on Tuesday, Dec. 29, 2009. A heavy snowfall hit Moscow on Tuesday. (AP Photo/Mikhail Metzel)

People walk along Red Square with St. Basil’s Cathedral seen through the mist and snow in background, on Tuesday, Dec. 29, 2009. A heavy snowfall hit Moscow on Tuesday. (AP Photo/Mikhail Metzel)

A frozen monument to Soviet founder Vladimir Lenin is seen as the temperature is below -30 degrees Celsius (-22 degrees Fahrenheit) in downtown Yakutsk, about 4,800 kilometers (3,000 miles) east of Moscow, Russia, Monday, Dec. 28, 2009. (AP Photo/Yakutsk Vecherny, Aexander Li)

A frozen monument to Soviet founder Vladimir Lenin is seen as the temperature is below -30 degrees Celsius (-22 degrees Fahrenheit) in downtown Yakutsk, about 4,800 kilometers (3,000 miles) east of Moscow, Russia, Monday, Dec. 28, 2009. (AP Photo/Yakutsk Vecherny, Aexander Li)

Fire erupts at the arsenal near Ulyanovsk, 720 kilometers (430 miles) east of Moscow, Friday, Nov. 13, 2009, while ammunition was being destroyed at the arsenal near Ulyanovsk. Provincial governor Sergei Morozov said 35 people who were working at the facility were considered missing, the Interfax, RIA Novosti and ITAR-Tass news agencies reported, also saying 3,000 people were being evacuated. (AP Photo/RIA-Novosti, Natalia Melnik)

Fire erupts at the arsenal near Ulyanovsk, 720 kilometers (430 miles) east of Moscow, Friday, Nov. 13, 2009, while ammunition was being destroyed at the arsenal near Ulyanovsk. Provincial governor Sergei Morozov said 35 people who were working at the facility were considered missing, the Interfax, RIA Novosti and ITAR-Tass news agencies reported, also saying 3,000 people were being evacuated. (AP Photo/RIA-Novosti, Natalia Melnik)

Firefighters work to control a fire in the Lenformash plastics factory in central St. Petersburg, Russia, early Wednesday, Nov. 4, 2009. Two people were reported injured. (AP Photo/Dmitry Lovetsky)

Firefighters work to control a fire in the Lenformash plastics factory in central St. Petersburg, Russia, early Wednesday, Nov. 4, 2009. Two people were reported injured. (AP Photo/Dmitry Lovetsky)

An elderly man and woman, no name given, hold lists of the victims of Soviet-era political repression as people gather to remember them on Lubyanka Square, in Moscow, Thursday, Oct. 29, 2009. Russians gathered Thursday in downtown Moscow near the Solovky Stone monument, a giant slab of stone taken from a Soviet labor camp in the Solovky Islands, partly seen at right, to remember the victims of Soviet-era political repression. The former KGB headquarters are seen at background left. (AP Photo/Pavel Golovkin) Critics of the Communist era were outraged when old Soviet national anthem lyrics praising Stalin were restored to a rotunda in the Kurskaya station this summer. Now there is talk of putting a statue of the dictator back where one used to stand, facing commuters entering the station.

An elderly man and woman, no name given, hold lists of the victims of Soviet-era political repression as people gather to remember them on Lubyanka Square, in Moscow, Thursday, Oct. 29, 2009. Russians gathered Thursday in downtown Moscow near the Solovky Stone monument, a giant slab of stone taken from a Soviet labor camp in the Solovky Islands, partly seen at right, to remember the victims of Soviet-era political repression. The former KGB headquarters are seen at background left. (AP Photo/Pavel Golovkin)

Critics of the Communist era were outraged when old Soviet national anthem lyrics praising Stalin were restored to a rotunda in the Kurskaya station this summer. Now there is talk of putting a statue of the dictator back where one used to stand, facing commuters entering the station.

Francesca Schiavone of Italy kisses the winner’s trophy after she defeated Olga Govortsova of Belarus at the Kremlin Cup tennis tournament’s final match in Moscow, Russia, Sunday, Oct. 25, 2009. (AP Photo/Misha Japaridze)

Francesca Schiavone of Italy kisses the winner’s trophy after she defeated Olga Govortsova of Belarus at the Kremlin Cup tennis tournament’s final match in Moscow, Russia, Sunday, Oct. 25, 2009. (AP Photo/Misha Japaridze)

Ekaterina Rubleva and Ivan Shefer of Russia perform during the gala exhibition at the Cup of Russia ISU Grand Prix figure skating event in Moscow, Russia, Sunday, Oct. 25, 2009. (AP Photo/Ivan Sekretarev)

Ekaterina Rubleva and Ivan Shefer of Russia perform during the gala exhibition at the Cup of Russia ISU Grand Prix figure skating event in Moscow, Russia, Sunday, Oct. 25, 2009. (AP Photo/Ivan Sekretarev)

Plushenko wins Grand Prix gold in Moscow Russia’s Evgeni Plushenko performs his free program to win the gold at the Cup of Russia ISU Grand Prix figure skating event in Moscow, Russia, Saturday, Oct. 24, 2009. (AP Photo/Ivan Sekretarev)

Plushenko wins Grand Prix gold in Moscow

Russia’s Evgeni Plushenko performs his free program to win the gold at the Cup of Russia ISU Grand Prix figure skating event in Moscow, Russia, Saturday, Oct. 24, 2009. (AP Photo/Ivan Sekretarev)

Russian Prime Minister Vladimir Putin, second left, and Italian Prime Minister Silvio Berlusconi, second right, partly visible, seen in a boat about to get aboard a Russian Be-200 amphibious aircraft for a test flight in St. Petersburg, Russia, Thursday, Oct. 22, 2009. (AP Photo/RIA-Novosti, Alexei Nikolsky, Pool)

Russian Prime Minister Vladimir Putin, second left, and Italian Prime Minister Silvio Berlusconi, second right, partly visible, seen in a boat about to get aboard a Russian Be-200 amphibious aircraft for a test flight in St. Petersburg, Russia, Thursday, Oct. 22, 2009. (AP Photo/RIA-Novosti, Alexei Nikolsky, Pool)