Make up your mind, appendix! Studies show that the organ, often more trouble than it's worth, has evolved independently in mammals over and over again.
Pseudo-stool created in a robotic gut can replace human fecal matter used to correct imbalances in bacterial colonies in patients left devastated by an infection.
Taylor Binns never planned to experience a simple delight of the world again: seeing it. The world was slowly going black, and time was running out. So he took his only options: a new procedure using stem cells. What we all take for granted became his gift: he could see again.