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When brain researcher Laura Cuaya moved from Mexico to Hungary, she wanted to know if her two dogs would recognize the change in language. So she devised an experiment.

Democrats fear time is running out to pass climate legislation before the midterm elections. Meanwhile, Democratic Sen. Joe Manchin of West Virginia is holding talks... with Republicans.

Two anesthesiologists threw the death penalty in California into turmoil this week when they walked out of the execution of a convicted murderer. The doctors objected when the state asked them to do more than observe the execution. Now death penalty experts wonder whether other states will have the same problem.

Government prosecutors want a federal judge to reconsider her decision to ban crucial testimony and evidence in the sentencing phase of the Zacarias Moussaoui case. They say the aviation security witnesses and evidence are essential to the case.

The prosecution rests in the first phase of the Zacarias Moussaoui sentencing trial. Prosecutors, seeking the death penalty, needed to convince the jury that at least one person who died in the Sept. 11 terrorist attacks could have been saved if Moussaoui had told authorities about his involvement with al-Qaida's plans.

In the Miami Cuban community, news of the arrest of Cuban exile Luis Posada Cariles has many people upset. Fidel Castro has asked the U.S. to extradite the Cuban exile, and former CIA operative, for his alleged role in a deadly airplane bombing. It's not clear why or where the U.S. is holding him.

After months of rumors, Apple Computer unveils a new iPod with the ability to play video. It also made an unexpected announcement: a groundbreaking deal with ABC that will allow users to download episodes of shows such as Desperate Housewives from the iTunes store.

CBS and NBC have joined ABC in making some TV shows available to viewers on demand. But for TiVo and other digital video recorder users, this is nothing new. And since each network's deal is with a different provider, is this big news for the average viewer without a DVR?

There's concern that the U.S. push to send more natural gas to Europe will come at a cost to the climate. But experts say the Ukraine crisis may actually invigorate efforts around sustainable energy.

Dana Shuster was a celebrated Vietnam war-era military nurse who wrote poetry about her experiences. One of her poems was read by Vice President Al Gore when the Vietnam Women's Memorial was dedicated in 1993. But it turns out she was never a nurse, never in the military and never in Vietnam.