The second video mentions that the head of an older small dog grafted onto a large younger dog got rejuvenated as far as the appearance of the fur goes. It'm al

The second video mentions that the head of an older small dog grafted onto a large younger dog got rejuvenated as far as the appearance of the fur goes. It'm almost angry that apparently no further research was done back then on what they now call heterochronic parabiosis. It's only in the recent years that this point of view, that aging is a programmed self-sustaining process, controlled via signaling molecules in the blood plasma, and not wear-and-tear, started emerging.