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What if diseases could be treated with a patient's own cells, precisely and on demand? Biotech entrepreneur Nabiha Saklayen explains how we could harness advances in biology, machine learning and lasers to create personalized stem cell banks -- and develop medicine uniquely designed for each of our bodies.

It's been 10 years since the death of Steve Jobs. Has Apple peaked after 10 years of Tim Cook's leadership, or is the best yet to come? Harvard Business School professors Youngme Moon, Felix Oberholzer-Gee and Mihir A. Desai debate the prospects for Apple -- and discuss the celebrities changing the way Hollywood does business, including Reese Witherspoon, Rihanna and more. After Hours is a member of the TED Audio Collective, a collection of podcasts for the curious. For new episodes every week, follow After Hours wherever you get your podcasts.

From a special black-footed ferret to coral that can withstand warming waters, genetic rescue efforts that use genomics and synthetic biology are helping nature thrive. But despite the huge successes of this kind of intervention, conservation innovator Ryan Phelan points out that fear of unintended consequences often stifles innovation -- risking further extinction. She makes the case for embracing the "intended consequences" of genetic tools that have the power to restore Earth's balance, abundance and biodiversity.

Why are global levels of anxiety and depression so high? Social epidemiologist Richard Wilkinson presents compelling data on the impact of inequality on mental health and social relationships in countries around the world. "Inequality," he says, "is the enemy between us."

Get transported on a stunningly rendered, sci-fi safari through Planet City: an imaginary metropolis of 10 billion people, from the brain of director and architect Liam Young. Explore the potential outcomes of an urban space designed to house the entire population of the earth -- and imagine answers to what is possible, and what is sustainable, for the planet.

Deep beneath your feet is a molten ball of energy the same temperature as the surface of the sun -- an immense clean energy source that could power the world thousands of times over, says technologist and climate activist Jamie C. Beard. How do we tap it? She lays out a surprising solution, and an unlikely alliance, to harvest geothermal energy from the Earth's core and get it to anywhere in the world.