Matt Cortland's mom would give him an earful whenever he called home. "She kept calling us to ask us what we can do about the gas prices in the US," he told Business Insider in early April when prices were just hitting a $4 a gallon average . "She'd say, 'It's just ridiculous.'" So Cortland and his husband, John Fleming — a postdoctoral researcher focused on AI systems at the University of Oxford — built a website called Gas Index to track prices. They used a smattering of AI tools to help