Epigenetics is the science of living DNA, charting the chemical pathways that spur DNA into action by turning genes on and off. While the Human Genome Project of the early 2000s was hailed as the key to understanding human heredity and disease, that historic effort was just the beginning. It has taken epigenetics to fill in the picture, explaining how the fixed code of our genome is implemented in countless living processes.

In C. S. Lewis: Writer, Scholar, Seeker, Dr. Sørina Higgins will take you on a fascinating expedition through the life and work of this influential author, examining the crucial events and relationships that shaped his personal, literary, and spiritual journeys.

Heidi Sormaz has a PhD in psychology from Yale University with an emphasis on cognitive psychology, and she’s been a meditation and yoga practitioner and teacher for two decades. She is also a reformed over-thinker, so, she knows exactly what you’re going through—or what you’re (over)thinking, so to speak. Over the 12 engaging lessons of Overcome Your Overthinking, Heidi not only provides the science behind cognitive behavioral therapy but she’ll also arm you with a toolbox of exercises and techniques that are most effective at breaking the spell of overthinking.

From the 17th to 18th centuries, bold thinkers cast off the authority of ancient traditions and embraced reason as the primary tool for understanding the world. These rationalists, or early modern philosophers, included René Descartes, Baruch Spinoza, and Gottfried Wilhelm Leibniz—visionaries whose answers to profound questions remain relevant today. Early Modern Philosophy: Descartes and the Rationalists covers the key philosophers of this period in 12 fascinating half-hour lectures, presented by award-winning teacher James D. Reid, Professor of Philosophy at Metropolitan State University.

Who wrote Great Expectations? That’s easy: Charles Dickens. Who’s the author of Beloved? Toni Morrison, of course. Now how about the Old Testament? You’d think for a book as widely known, studied, and distributed as the Bible, the question of authorship would have been sorted out by now. But the question is more complex (and fascinating) than it seems. Why? Because asking it is to challenge everything we might assume about the Bible’s identity as a book, about what “writing” and “authorship” really mean, and about how a written text could become sacred.