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The charges of the proton and electron are opposite and equal, even though the proton is bigger. But why are they equal? This is one of the deepest unresolved puzzles of physics. Frank Close takes us on a journey into the quantum subatomic world of particles. He describes the strong and weak forces that operate alongside electromagnetism, the color and flavor charges, as well as the parallels between them, giving hints of a deeper unity.

Gases are all around us—they fill our lungs, power our movement, create stars, and warm our atmosphere. Often invisible and sometimes odorless, these ubiquitous substances are also the least understood materials in our world, and always have been. It wasn’t long ago that gases were seen as the work of ancient spirits: the sudden closing of a door after a change in airflow signaled a ghost’s presence. Scientists and engineers have struggled with their own gaseous demons.

Carbon is the only element in the universe with properties capable of animating every facet of the living world. Despite comprising a tiny fraction of Earth’s composition, our planet is lifeless without it. However, it has been maligned as a leading cause of climate change, reduced to an errant element and blamed as our civilization careens towards its own demise. In Carbon, Paul Hawken looks at the flow of life through the lens of carbon.

How does a mere molecule—a chemical structure—become a drug? And how do we know that it works safely? In a one-trillion-dollar pharmaceutical industry with high-stakes profits and perils, battles are raging every day to successfully bring a molecule to its birth: an FDA-approved medicine. In Race for a Remedy, Makhdum Ahmed, MD, an internationally renowned expert in cancer treatment and drug development, takes listeners behind the scenes of the fascinating and intense world of cancer drug development.