Well, I would highlight medicine because advances in this sphere have touched the lives of nearly every person on the planet helping to save their own lives or the lives of people they have loved. I think I should mention such medical breakthroughs of the century as the discovery of penicillin and DNA which carries the genetic information that makes us what we are. Some more breakthroughs that are worth our attention are blood transfusions, artificial hearts and heart transplants and test tube babies. Considering the progress that has been made in medicine in the last century we should also recall the prevention of nutritional deficiencies and successful treatments for once deadly infections. Well, I guess I have named enough facts to prove my point.