Alzheimer's ravages the minds of over 40 million victims worldwide. Join scientists as they untangle the cause of this tragic illness and go behind the scenes of major drug trials to discover the therapies that may slow and even prevent the disease.

Just about every solid, liquid, or gas in the world as we know it begins with reactions between individual atoms and molecules. Host David Pogue dives into the transformative world of chemical reactions, from the complex formula that produces cement to the single reaction that’s allowed farmers to feed a global population by the billions—a reaction that when reversed, unleashes the powerful chemistry of high explosives.