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Man's interference with Colorado River floods that used to regularly flow to the Salton Sea may have "stopped the clock'' on a regular series of big earthquakes, setting the stage for a megaquake.

A meeting of agriculture ministers comes as some experts are predicting another rise in grain prices like that of 2008, which sparked panic and deadly riots. A relief organization estimates rising staple prices have pushed 44 million into poverty in recent years.

What's the role for local media in the 24/7 digital age? We'll look at the changing relationship between the media and public and how local news organizations will survive in the future.

South Carolina might be key to Sen. John McCain's presidential bid. The state, which holds its Republican primary Jan. 19, is home to thousands of military veterans. McCain is a war hero. The state's Democratic primary is set for Jan. 26.

Tomatoes are the most frequently bought and the most commonly homegrown vegetable in the United States. With all that popularity we wondered whether consumers can tell the difference between organic and conventionally grown tomatoes, and is one growing method better that the other? KPBS Environmental Reporter Ed Joyce put organic, heirloom and conventionally grown tomatoes to the test and tells us what he's found out.

Hamas presented a proposed cabinet on Sunday. It gave itself key ministries after failing to persuade more moderate parties to join in a coalition that could have softened its militant image.

In Utah, rescue crews are drilling holes from the surface to try to provide ventilation — as well as communication — to the location of the six miners, trapped since a mine collapsed Monday. One of the owners of the mine says rescuers hope to reach the men Thursday.

Hundreds of thousands of immigrants marched, and scores of businesses closed, for what some called the "Great American Boycott." But what impact did the "Day Without Immigrants" have on the United States?

Five years after the invasion of U.S.-led forces in Afghanistan, the Taliban has been making a comeback in the country's south. But in the north, at least one village has found peace and prosperity.

Migrants' rights activists left San Diego today on a 2,000-mile journey. They're remembering people who died while trying to cross the U.S.-Mexico border. KPBS Radio's Andrew Phelps met the demonstrat