DEEP TIME WALK

Free, deeptimewalk.org

An exploration you experience by walking. You listen to a history of the Earth that's tied to each step. The game calculates your speed and distance to match your real-world progress and translates it to a journey across 4.6-billion years of time, taking in every key evolutionary event as they occur. It’s not only a good reason to get out the house, but it offers a meditative and educational experience for all ages.