A biotech company recently announced that it's implanted another pig kidney into a human recipient. Here's what to know.

A pig kidney kept an Alabama woman alive for five months - longer than anyone ever before. Doctors aren't sure yet why it suddenly stopped.

This animal-to-human organ transplant, or xenotransplant, was made possible through advancements in gene-editing and cloning. With insufficient human kidneys to meet the demand for transplants ...