US President Donald Trump said Sunday he was "very angry, pissed off" with Russian leader Vladimir Putin, NBC reported, marking a sharp change of tone as Washington seeks to end the war in Ukraine ...

Doctors in China have become the first to report details about a transplant of a genetically modified pig liver into a human. The liver was transplanted last year into a person who was brain-dead ...

The pig liver produced far smaller amounts of bile and albumin than a human liver could achieve, Lin said. More research is needed—including studying the pig liver for more than 10 days, he added.