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15 new buses running on compressed natural gas will roll onto the streets of central Arkansas later this week. The new buses are the visible face of an…

Tigers have round pupils, but domestic cats have vertical slits in the center of their eyes. What gives? A census of the shapes of animals' pupils suggests size and way of life each play a big role.

We're not talking steroids here; we're talking about the stuff you can buy at the supermarket. They're not dangerous in themselves. But overuse can signal emotional or physical problems.

The number of people on the planet is growing at the fastest rate in history. U.N. demographers say the world's population will be up by 4 billion at the end of the century.

After 16 years as host of The Daily Show on Comedy Central, Jon Stewart presented his farewell program last night. TV critic David Bianculli says it was an entertaining finale from start to finish.

In Ricki and the Flash, Meryl Streep plays a singer who left her husband and kids decades ago to pursue her rock 'n roll dream. Reviewer David Edelstein says Streep "tears up the screen" in the film.

The self-declared Islamic State has made gains in Syria, capturing a largely Christian town and abducting people along the way.

In the French town of Calais, some migrants are trying to build a sense of normality to the sprawling unofficial camp where thousands seek shelter.

The problem appears worse in some communities, but it’s not often clear why.

A jury in Colorado had been weighing whether he'd get the death penalty after finding him guilty of first-degree murder last month. Twelve people were killed and 70 injured in the 2012 attack.