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This is the year that drive-in movie theater owners have dreaded: They must convert their projectors from film to digital. It costs tens of thousands of dollars to make the switch, and that may be too much for many of the remaining 400 or so drive-ins left in the United States.

The Standard Heights neighborhood sits next to the nation's second-largest gasoline refinery. Recently, residents learned a new truth about the plumes of exhaust they see every day: Exxon Mobil's aging refinery and petrochemical facilities — like many others — are pumping out far more pollution than the law allows.

The dose of radiation an astronaut would experience on a trip to Mars is higher than the annual limit set for workers at nuclear power plants. But Mars enthusiasts say the radiation threat isn't high enough to cancel the trip.

Degree-granting institutions are responding to austere budgets by catapulting themselves into the world of online education. But some professors point to low online completion rates as evidence that these "massive open online courses" do a disservice to students.

For centuries, the French have been sans a term for "French kiss." The latest edition of a popular dictionary attempts to rectify that.

The agency has finished retrofitting controversial full-body scanners with software that allows only a generic outline of the passenger's body to be seen.

Environmentalists are focusing on big corporations to prevent the destruction of rain forests cut down for paper products. With help from some unlikely characters, they've scored a success against one of the world's largest paper companies.

Pledge 51 creates applications for Nigeria's low-tech cellphones. The company thinks it could grow its business with help from foreign investors, but Nigeria's low GDP has made that difficult. If the country changes the way it calculates this figure, that could help Pledge 51 bring in new investment.

Houston's air quality improved dramatically over the past decade, but the city is still short of meeting the latest smog standards. Getting there isn't simply a matter of cracking down more on the petrochemical industry — the city needs to deal with cars on its sprawling roads, and bad air blowing from out of town.

Yanira Maldonado of Goodyear, Ariz., was taken into custody last week after 12 pounds of marijuana were found under her seat on a bus in Mexico. Her case drew international attention. She was released late Thursday after a judge saw video of her boarding the bus without the drugs.