Taking a walk is great for inspiration. There have been numerous studies about how people think more clearly on walks, and how new ideas come to them more frequently while doing so. Thats part of the reason some of the most famous minds in history included a daily walk in their schedule. Just such an inspiration must have happened recently to Nicholas Heinz, a scientist at NASAs Jet Propulsion Laboratory (JPL) in California. On a hike in Arizona he found a rock that could be used as an analog of a unique one found by the Perseverance rover on Mars - and decided to take it back to his lab to study it.x