CALIFORNIA

Federal prosecutors in California have launched an investigation into the subsidiary of Caterpillar Inc.

On Friday, a shooter killed one man and injured three others at Los Angeles International Airport. Who is 23-year-old Paul Anthony Ciancia, the alleged airport gunman now in police custody?

Scientists find a surprising degree of variation among genomes of individual neurons from the same brain.

Is the Mexican wolf menacing enough to require kids to wait for school buses inside protective cages? Ecologists are skeptical.

The suspect is in critical condition. Authorities say the attack is over.

One of the world’s largest and most technologically advanced solar photovoltaic power plants is now commercially operational in California.

Tesla Motors reports on Tuesday. Here’s what you should look for besides a profit.

(Hint: It’s not far from the company’s headquarters)

Weighing the pros and cons of the new digital currency.

According to new climatology research, molecules in a redwood tree's trunk reflect climate changes.

What does the Google Play Store reveal about the Nexus 5 release?

"Twilight" stars Robert Pattinson and Kristen Stewart were spotted together in LA this week.

The head of $2 trillion in assets under management said he now finds his "intellectual leanings shifting to the plight of labor."

The Sonoma sheriff's deputy fatally shot a 13-year-old carrying a toy rifle.

The haunted house is a staple of Halloween. Here are the seven most haunted places in the United States.

Unfortunately for tech-inclined fashionistas (or fashion-inclined techies), the new model of Google Glass is dorkier than ever.

Cecilia Abadie, a Google Glass explorer, was ticketed by police for driving with the smart glasses.

Apple acknowledged a manufacturing defect in some iPhone 5s units, but draining-battery life could also be solved with a variety of techniques.

Officials are calling on local governments to address the issue of “microplastics” in North America’s Great Lakes.

A hot sauce is being sued by the city of Irwindale, Calif.

Chinese investors are investing in distressed, cheap American commercial properties.