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Large-animal vets ensure the health of cows, pigs and horses, but they're also the first line of defense against diseases that can spread from animals to humans — so a shortage leaves producers, and global markets, vulnerable to devastating outbreaks.

NASA has announced it is moving forward with several plans to return rock samples from Mars.

Researchers have discovered a Mayan site hidden deep in the jungle on the Yucatan Peninsula thought to have been built over a thousand years ago.

Senate Majority Leader John Thune is a key ally of President Trump's, helping get his domestic policy bill passed by the Senate. It is a dramatic reversal from their days as virtual political enemies.

The incoming Trump administration has expressed a desire for a big overhaul at the Department of Justice and the FBI.

In a key California Central Valley House race, both the Democratic and Republican candidates have bucked their parties' national platforms to try to win in this purple district.

The remote region of Ridgecrest, Calif., was hit by back-to-back earthquakes, the state's biggest in 20 years. The many powerful aftershocks have residents worried about what comes next.

The gun control debate continued to dominate the news this week with President Obama coming out strongly in support of reforming the current gun control laws alongside the Newtown families. Host Jacki Lyden speaks with James Fallows, national correspondent with The Atlantic, about that story along with the bird flu in China, North Korea and the Postal Service.

The Pentagon announced it will cut its budget by some $50 billion each year for the next five years. But questions remain about where those tens of billions of dollars in savings will come from.

NPR's Scott Detrow talks with researcher James Penca about two new discoveries in the wreck of the Titanic: a statue experts thought lost, and the collapse of an iconic part of the ship.