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A Chinese company plans to buy U.S. pork giant Smithfield Foods for nearly $5 billion. The deal may undergo review by an interagency panel known as the Committee on Foreign Investment in the U.S. The panel has played a significant role in shaping foreign investments in this country for nearly four decades.

New video has emerged of Tuesday's freight train derailment near Baltimore, Md., that caused a huge explosion and led to the area being evacuated. Many people captured the crash's aftermath on camera.

With the right chemistry, cement can take on some of the properties of a metal, researchers report in the Proceedings of the National Academy of Sciences. Chris Benmore, a physicist at Argonne National Laboratory, explains why a semiconducting cement might be useful.

"Office hours are some of my favorite hours of the week," says professor Tom Carlson, a medical doctor, ethnobotanist and instructor of 1700 students annually at the University of California, Berkeley. One of Carlson's former students, SciFri associate senior producer Christopher Intagliata, says Carlson's class got him on the path toward science. In this "Teacher Feature," Intagliata tells his former teacher what the class meant to him.

For the annual Quiet Music Festival of Portland, which begins today, the goal is to celebrate calming sounds. The festival gained fame after the show Portlandia featured a Battle Of The Gentle Bands.

The coffee chain says it will enforce its no-smoking rule at its outdoor seating areas and within 25 feet of store entrances. So, no coffee and a smoke for those who enjoy them together. Have smoking bans gone too far or not far enough?

Scientists are trying to figure out how chemicals in the air interact with each other to make people sick. So they're building an instrument — a "lung in a box" — that goes way beyond the usual chemical monitors.

New technology is changing the way cities are run, with cutting-edge urban innovations around the globe. Sprawling, chaotic Rio de Janeiro has built a state-of-the-art operations center as it gears up for two major events.

Mastectomies have become increasingly popular for women with breast cancer. That's a big turnaround from the 1980s, when women abandoned mastectomy in favor of breast-saving lumpectomy.

The Mediterranean diet is one of the healthiest styles of eating in the world. But in many regions, including Denmark and Sweden, it's not easy to follow when olive oil is hard to find. Now Nordic researchers are exploring the health benefits of a Nordic diet, based on local foods like herring and bilberries.