The study could pave the way for transplanting porcine organs to humans without the risk of reigniting endogenous retroviruses.

Thomas Starzl performed the first successful human liver transplant in 1967 and went on to help develop drugs that improved survival for organ transplant patients.

A donor heart from a genetically modified pig survives for more than 2.5 years inside a baboon’s abdomen.

Can mice with humanlike tissues better model drug effects in people?

Science publishing is locked in an evolutionary arms race as it edges further into the digital age.