NPR News

Schools worried about concussions increasingly use computerized tests to tell if a student athlete has a brain injury. But new research says those tests aren't reliable enough to diagnose concussion, or to tell if it's safe to return to play.

The researchers looked at research on one computerized neuropsychologist test, called ImPACT, that is widely used by colleges and high schools. (Here's one NPR story on how high schools use ImPACT to assess concussions.)

Syria's protest generation is obsessed with images.

Thousands of videos have been posted on YouTube during the 10-month revolt against President Bashar Assad's regime, even as regime snipers take deadly aim at the photographers.

The smugglers who carry critical medical supplies to underground clinics in protest cities also smuggle in cameras hidden in baseball caps and pocket pens. The obsession comes from the conviction that documenting the brutality will stop it — this time.

In a sign that the economic sanctions imposed by the U.S. and those announced by the European Union are squeezing Iran, the chief of Iran's judiciary warned that major currency speculators could face the death penalty.

The AP quotes Ayatollah Sadegh Amoli Larijani as saying that "depending on the importance of their crimes, some of the economic corrupted can face execution."

Three years ago, venture capitalists were pouring billions of dollars into technologies like solar power, wind power, biofuels and fuel cells. The federal government followed, directing some $44.5 billion into clean technology from late 2009 to late 2011 through loans, subsidies and tax incentives.

But now the clean-tech industry is facing leaner times, in part because of cheaper natural gas prices, the effects of the financial crisis and China's growing solar industry.

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MICHEL MARTIN, HOST:

I'm Michel Martin, and this is TELL ME MORE, from NPR News.

Coming up, millions of eyes will be on Indianapolis this weekend as it hosts the Super Bowl for the first time. We'll check in with the city's mayor to see how the preparations are going for the big game.

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MICHEL MARTIN, HOST:

I'm Michel Martin and this is TELL ME MORE from NPR News. Coming up, there are changes in Google's privacy policy and they are causing a stir. We'll talk about that and we'll also talk about Facebook's new stock offering. That's coming up in a few minutes.

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MICHEL MARTIN, HOST:

We're going to head now from the site of the Super Bowl to some of the world's biggest websites. Big changes are in store at Google and Facebook.

As the never-shy Donald Trump prepares for what he says will be "a major announcement ... pertaining to the presidential race" at 3:30 p.m. ET in Las Vegas, there's word from CNN that its sources say the Donald will endorse Mitt Romney's bid for the Republican presidential nomination.