Dallas: A color-coded smart tag could tell consumers whether a carton of milk has turned sour or a can of green beans has spoiled without opening the containers, according to researchers.

Albuquerque: Unexpected voltage increases of up to 25 percent in two barely separated nanowires have been observed at Sandia National Laboratories.

Columbus: For the first time, physicists have demonstrated that information can flow through a diamond wire.

Toronto: A joint study by researchers at the University of California San Diego and the University of Toronto has found that a computer system spots real or faked expressions of pain more accurately than people can.

Online journals, better known as blogs, are becoming more and more popular. When the Internet was first getting started, users rushed to build personal web sites. Web sites are still very popular among web users, but many are now turning to blogs.

Online chat may refer to any kind of communication over the Internet that offers a real-time transmission of text messages from sender to receiver.