“Like riding a bike” is shorthand for the remarkable way that our bodies remember how to move. Yet in recent years, scientists have discovered that our muscles themselves have a memory for movement and exercise. —Bonnie TsuiThis piece is part of MIT Technology Review Explains: our series untangling the complex, messy world of technology to help you understand what’s coming next. 2025 climate tech companies to watch: Traton and its electric trucksEvery day, trucks carry many millions of tons of cargo down roads and highways around the world. —Amy NordrumTraton is one of our 10 climate tech companies to watch—our annual list of some of the most promising climate tech firms on the planet.