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The motivation for flying with other birds in V formation is probably to save energy, say researchers who tracked the pattern of wing flaps in an ibis flock. Each bird in the V catches a bit of lift from the bird ahead.

The blaze at a complex that housed the elderly quickly engulfed much of the building. Investigators were having a hard time searching for victims because water used to fight the flames had frozen over the scene. A key question: Why was the complex only partially fitted with sprinklers?

For a long time, archaeologists weren't sure what to make of the cookware excavated at ancient Mycenaean ruins in Greece. That is, until one researcher built replicas of the vessels to try to cook just like the Mycenaeans did.

Reversing a trend that dates back to the 1990s, the lobbying industry is becoming more secretive. And campaign money now looms ever larger as a critical element in the persuasion business.

While Mexican immigration to the U.S. has slowed in recent years, the number of Central Americans heading north has been on the rise. Last year, the number of illegal border-crossers caught from countries other than Mexico hit nearly 100,000 — more than double the year before.

The burden for retirement planning has shifted dramatically, from traditional pensions run by experts to 401(k)s that require decisions by "gravely undereducated investors, Vanguard founder John Bogle says. He says the government should set minimum standards to protect retirement plans.

United Nations prosecutor Carla del Ponte has told Swiss news outlets that there's evidence pointing at the opposition, not the Assad regime. The U.N. says no "conclusive findings" have been reached. The White House is skeptical about del Ponte's comments.

The offer comes after anti-government demonstrations spread to cities where the citizens have shown support for the president. Meanwhile, the nation's justice minister has warned she may declare a "state of emergency" unless protesters leave her headquarters.

It started in Sochi, continued in Rio and now Team Finland is continuing its tradition of knitting during the Olympics. The Finns claim it's relaxing and fun.

The 48-year-old takes over the party with no direct connection to Ireland's period of bloodshed known as the Troubles.