Surgeons at NYU Langone Health made the monumental step of successfully connecting a pig's kidney in to a human patient. This could completely change the landscape for organ transplants going forward. 

It was better than I think we even expected,” Robert Montgomery, M.D., the NYU transplant surgeon who led the procedure, told the NYT. “It just looked like any transplant I’ve ever done from a living donor. A lot of kidneys from deceased people don’t work right away and take days or weeks to start. This worked immediately.

A sugar molecule linked to previous organ rejections was removed from the pigs genes, and after 54 hours of monitoring the procedure appeared to be a success. Longer term results are yet to be published, but this is certainly a promising development with 106,000 people in the US currently on the waiting list for donor organs. 

The potential availability of effective and sustainable alternatives to human organs would be a real breakthrough.