New drugs and surgical techniques offer promise in the fight against cancer, Alzheimer's, tuberculosis, AIDS, and a host of other life-threatening diseases. Animal research has been, and continues to be, fundamental to advancements in medicine.
If you can feel like a good man in your 40s, you can feel like a better man in your 50s, a Superman in your 60s, and maybe a Spider-Man in your 70s.