Sometimes when we are out in nature we encounter reminders that we are not the first people to have visited the place where we now stand. In an area of Dinosaur National Monument straddling the Utah and Colorado border I was lucky to find this petroglyph carved into a swath of desert varnish. I love seeing these signs of human presence. Much of American Indian rock art has been defaced or obstructed by modern-day graffiti. Finding carvings which appear like they have been untouched for hundreds of years is becoming rarer and rarer. These are moments that are worth taking time to enjoy.