Scale Worlds lets you experience the full range of scale in the universe.

Scale Worlds is a learning environment that allows you to zoom into the smallest and largest possible sizes in the universe. You can also create visible ratios of size differences between pairs of entities, to better appreciate relative size differences and assign numbers to them. But first you need to calibrate your screen so that all measurements are accurately displayed — including making a bird the size of a bird. Scale Worlds was developed at North Carolina State University under the leadership of Karen Chen, Cesar Delgado, and Matthew Peterson. This version was designed and developed by Matthew Peterson, after the earlier VR-based versions.