After producing more than 160 episodes of Exponential View over the last six years, we’re taking a break to reflect on what we’ve learned and how the conversations we’ve hosted with leaders are changing our perspective on the future. While we percolate on the future of our podcast, we have a challenge for you: find all the phenomenal conversations we’ve hosted that you haven’t heard yet –and take alisten. (And please let us know which episodes helped you understand the world and your future!)

This episode is a special introduction to Cold Call, another podcast from Harvard Business Review. Host Brian Kenny explores Shield AI’s work with the U.S. government to develop autonomous combat robots. Harvard Business School professor Mitch Weiss and Brandon Tseng, Shield AI’s CGO and co-founder, join Brian to discuss the challenges start-ups face in working with the public sector, and how investing in new ideas can enable entrepreneurs and governments to join forces to solve big problems.

How do you talk about a product before anything like it exists? How do you guide the engineers building it and the marketing department who has to sell it? As co-creator of the iPod and iPhone, founder of the learning thermostat Nest, and with over 300 patents to his name, Tony Fadell is a serial entrepreneur who now focuses on investing. He tells Azeem Azhar how he uses opinion-based decision-making in his work, and why thinking like a product manager helps drive radical innovation.

Carbon recycling takes our polluting carbon dioxide and carbon monoxide and, with the help of bacteria, turns them into ethanol. This can replace oil as the basis for carbon-based chemicals industries (e.g., fertilizers, plastics, clothing, health and beauty products, etc.), as well as offering sustainable fuel and animal feed. Jennifer Holmgren, CEO of LanzaTech, joins Azeem Azhar to share her vision of the future where greenhouse gases provide a core contribution to our sustainable life.

Quantitative hedge funds, which rely on the work of employed mathematicians to develop complex trading strategies, are nothing new. But what if the mathematical work is outsourced to anyone, via a contest where the best predictions are rewarded with cryptocurrency? Richard Craib, founder of Numerai, explains to Azeem Azhar how his $70 million fund uses collective intelligence to perform well, despite the turmoil in the markets.