Special Episode: Mary Roach & Replaceable You

<p>When your car breaks down or your fridge goes on the fritz, you can order a replacement part and get things back up and running in no time. The same cannot always be said for another intricate machine: the human body. For centuries, scientists have grappled with making or transplanting suitable replacements for nearly every body part, from hearts to hair and from legs to lungs. We&rsquo;ve come quite a long way in that quest, so that at times, it feels as though we&rsquo;re living in a sci-fi novel, where skin cells are printed and we can grow a customized heart. Yet we still have further to go, thanks to our magnificent immune system, who proves to be quite a worthy opponent. Here to tell you all about the weird and wonderful world of regenerative medicine is the one and only&nbsp;<a href="https://maryroach.net/" data-saferedirecturl="https://www.google.com/url?q=https://maryroach.net/&amp;source=gmail&amp;ust=1757630964849000&amp;usg=AOvVaw095x7XZvKOMy8nCFEkpuBg">Mary Roach</a>, w...