Dr. Sanjay Gupta explores the world of disease reversal, from Amyotrophic lateral sclerosis (ALS) to strokes to diabetes.

The human body is capable of extraordinary feats; Dr. Sanjay Gupta meets the team working to break the two-hour marathon.

Dr. Gupta explores the world of memory and the mind; Learning from champion memory athletes about challenging the brain to improve one's own memory.