Sinéad O'Sullivan, entrepreneurship fellow at Harvard Business School, discusses how space is much more important to modern business than most people realize. It plays a role in making food, pricing insurance, and steering self-driving cars. While moonshot projects from SpaceX to Blue Origin drive headlines, the Earth-facing space economy is booming thanks to plummeting costs of entry. As tech companies large and small compete to launch thousands of satellites, O'Sullivan says we are actually running out of space in space.