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Wreckage believed to be from the 2011 Japanese tsunami is washing up thousands of miles away in Alaska. The debris isn't just unsightly — it poses environmental worries for the landscape and animals. One conservationist says the problem may be worse than the Exxon Valdez oil spill.

The prefabricated nuclear reactors, which would be small enough to build in a factory and ship on trucks, would generate about one-tenth the power of a typical nuclear power plant. It's potentially a growth opportunity for American industry, but critics say the reactors carry a host of safety, security, environmental and economic concerns.

Over the weekend, one of the main Syrian opposition leaders held informal talks with the regime's main backers — Russia and Iran. The talks were held on the sidelines of a security conference in Germany. It's unclear whether this creates an opening to a political settlement that could end the bloodshed in Syria.

Twitter was on fire during the Super Bowl, but the twitterverse really lit up when the lights went out at the Superdome. Someone created a Twitter account named "SuperBowlLights." Many people tweeted Beyonce must have caused the failure with her electric half-time show.

The Canadian mint stops distributing pennies on Monday. Canada stopped making one-cent coins last year to cut costs, since each penny cost 1.6 cents to make. Most stores will round out change to the nearest five cents.

Also: Jared Diamond gets into trouble with an indigenous rights group; NFL players re-imagined as Dickens characters; a new theory about the Lockerbie bombing; and the best books of the week.

The game had drama — including a 108-yard kickoff return and a last-minute drive that almost changed the outcome. But the Ravens' 34-31 win over the 49ers will also be remembered as the night the lights went out in the Superdome. Did the outage make it a better Super Bowl?

Also: Malala, Pakistani girl shot by Taliban, speaks out; Iran says Israel will regret strike on Syria; hostage situation continues in Alabama, where a 5-year-old boy has been held for almost a week.

Three years of austerity measures are hitting ordinary Greeks hard. Unemployment is nearly 27 percent and rising, and the once dependable safety net of welfare benefits is being pulled in. Further cutbacks and tax hikes are about to kick in.

A study in South Africa finds that an experimental vaccine against TB didn't help protect infants very much against either infection with TB or development of disease. The results were a setback, but researchers say the field remains promising.