When Everett Knowles hitched a ride on a Boston train, he expected to make it home in a few minutes. But the result was the final...
A pig heart in a human? Before this year, a heart transplant surgery like this seemed unlikely, but over 50 years of innovations have made it...
Doctors and scientists have been trying to transplant organs between species for decades. They may have just succeeded. 0:00 Introduction 0:52 Succesful transplant 1:27 Why pig...