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Linda Wertheimer talks to USDA expert Steve Davis about fertilizer runoff in Lake Erie. Excess phosphorous fed the algae bloom that resulted in a tap water ban over the weekend in Toledo, Ohio.

Studies warn that climate change will threaten corn production in coming decades. Meanwhile, farmers are experimenting with new planting methods in hopes of slowing soil erosion from torrential rains.

Eight years after the FDA approved the first vaccine against HPV, only 57 percent of female teens and 35 percent of male teens have been inoculated, the CDC says. Are doctors partly to blame?

Arthur T. Demoulas, chief executive of the New England grocery chain Market Basket, was pushed out by his cousin in a boardroom struggle. Protesting employees have brought business to a standstill.

With Iraq's military in tatters and U.S. forces gone, the Kurdish peshmerga is the only viable force to stave off ISIS in Iraq. With little support from Baghdad, discontent grows among the fighters.

Under a new agreement, the U.S. and China will extend visas from the current one-year term to five and 10 years. President Obama is in China for the Asia-Pacific Economic Cooperation forum.

The astrophysicist has been tweeting about the science behind the film. In an interview with NPR, Tyson goes beyond those tweets, into wormholes, relativity and even some spoilers.

One of the largest public school systems in the U.S. dropped religious affiliations for holidays on its school calendar. The decision represents a classic church and state battle.

As oil prices dip, controversial and relatively expensive production methods, like oil sands and fracking, have become less profitable. Some drillers are already cutting back on plans for more wells.

Running back Marcus Lattimore, 23, retired from the NFL Wednesday. He says he chose a higher quality of life, citing a lingering knee injury. Lattimore reportedly has a $1.7 million insurance policy.