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Copyright 2016 NPR. To see more, visit http://www.npr.org/.

Copyright 2016 NPR. To see more, visit http://www.npr.org/.

Copyright 2016 NPR. To see more, visit http://www.npr.org/.

Copyright 2016 NPR. To see more, visit NPR.

There's an explosion of interest in friendly bacteria.

Beneficial microorganisms, as we've reported, can help us digest food, make vitamins, and protect us against harmful pathogens.

As this idea gains traction, so too does the popularity of fermented foods such as yogurt, sauerkraut and kimchi.

Though the science is tricky, researchers are learning more about how this ancient technique for preserving food may also help promote good health.

All the bad news around lead and water has people worried. So we decided to create a step-by-step guide to help find out if the pipe bringing water into your home is made of lead. Get started here.

Editor's note: This is an excerpt from the latest episode of the Invisibilia podcast and program, which is broadcast on participating public radio stations. This story contains language that some may find offensive.

Updated 9:42 a.m. ET

Voters in the U.K. have decided to leave the European Union, a decision that has shocked Europe, shaken global markets and pushed Prime Minister David Cameron to announce his upcoming resignation.

The EU referendum vote was decisive — 52 percent to 48 percent in favor of dissolving the United Kingdom's 43-year membership in the European community. But Northern Ireland and Scotland voted in favor of remaining, raising the specter that the United Kingdom itself may break apart.

Copyright 2016 NPR. To see more, visit http://www.npr.org/.

Just a week before a Vermont law kicks in requiring labels on food containing genetically modified ingredients, U.S. Senate agriculture leaders announced a deal Thursday that takes the power out of states' hands — and sets a mandatory national system for GM disclosures on food products.

Sen. Pat Roberts, R-Kansas, the chairman of the U.S. Senate Committee on Agriculture, Nutrition, and Forestry, unveiled the plan that had been negotiated for weeks with U.S. Sen. Debbie Stabenow, D-Michigan.

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