I mentioned it because of this recent article: https://www.economist.com/news/science-and-technology/21724967-might-be-true-people-too-blood-young-animals-can-r

I mentioned it because of this recent article: https://www.economist.com/news/science-and-technology/21724967-might-be-true-people-too-blood-young-animals-can-revitalise-old https://www.economist.com/news/science-and-technology/217249...