Welcoming millions of people each year, the fossils in the Deep Time Hall are the most visited collections in the most visited natural history museum in the world. The gallery presents many important concepts alongside its collection, highlighting critical milestones from 3.7 billion years of biological history within a 30,000sf exhibit. Unique to other paleontology exhibits, Deep Time also tackles the most pressing environmental issues of our time. The continuous flow of life and time is one of the most important design concepts of the Hall, which teams with outdoor scenes of ancient life.