NEAR BLACKSBURG, Va. — It's a crisp, clear winter day as I drive down a winding two-lane road through the foothills of the Blue Ridge Mountains in southwest Virginia and turn onto an unmarked gravel ...

Surgeons externally attached a pig liver to a brain-dead human body and watched it successfully filter blood, a step toward eventually trying the technique in patients with liver failure. The ...

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David Ayares, president and chief scientific officer of Revivicor, holds a piglet raised for research at a company farm in Montgomery County, Virginia. (Scott P. Yates for NPR) NEAR BLACKSBURG, Va. — ...