The Scale of The Universe v.2
The Scale of The Universe came out a few years ago and provided an interactive scale of all things known. It presents the initial scale of a human being with a few comparatives. Click on any element on the screen to learn more about it. As students move the slide left to zoom in, they can examine the smaller side of things all the way to theoretical Quantum Foam. Move to the right to zoom out and one ends at an illustration of the entire observable universe within the 'estimated' size of the universe. It makes for a fascinating exploration with many tangents for learning and discussion.