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British researchers say the time has come to buckle down on the number of embryos used during in-vitro fertilization. Three or more is entirely too many, they concluded after looking at data on more than 124,000 IVF treatments.

It's hard to fathom from afar just how rough the weather has been in parts of Alaska for the past month or so. It's winter, sure. But things have been particularly brutal. And there seems to be no end in sight.

When an officer kills someone with his or her firearm, an investigation almost always follows. Las Vegas Review-Journal reporter Lawrence Mower explains how districts respond when incidents occur, and former police officer David Klinger explains how officers determine when to use deadly force.

Janklow, who resigned his congressional seat in 2003 after being convicted of manslaughter for running a stop sign and killing a motorcyclist, made some political enemies, and at least one speaks ill of him in death.

The Alabama teen went missing while on a high school graduation trip in Aruba in 2005. Her body has not been found.

Two years after a massive earthquake leveled Haiti's capital, more than a half-million people remain in tent camps and tons of rubble must still be cleared away. But there is reason for some optimism. Reconstruction is picking up, and the new government has created a sense of relative stability.

A bell tolled Thursday at the Old South Meeting House in Boston for the first time since 1876. The meeting house was a Puritan gathering place where the Boston Tea Party was planned. Ben Franklin was baptized there. Thursday Bostonians heard a historic new bell — one cast by silversmith Paul Revere.

While carbon dioxide is indisputably a significant factor in the planet's changing climate, scientists and policy experts have faced major troubles in limiting production of the greenhouse gas. Now, some are focusing on other things that warm the planet, especially ozone and black carbon. And the tools to fight them are familiar.

For the first time, groups can apply for Internet addresses with their own suffixes. The one U.S.-created organization empowered to regulate the global Internet planned this expansion, which highlights the debate over whether another entity, such as the U.N., should take over Internet governance.

Hear Isaak's signature croon go to work on covers of artists from Memphis' Sun Studios.