The Scale of the Universe
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It starts at the quantum level and shows the size of various forms of matter in our Universe to scale. There is a slide bar that you can move to zoom in and out. When zoomed all the way in, you are viewing quantum foam and a plank, the smallest form of matter. As you slide the bar, you zoom out and pass an assortment of particles in ascending order according to size. We pass the neutrino, the preon, the building blocks of quarks, the quark itself, the proton and so on until we reach a grain of salt, human skin, a robins egg, a human, a plane, waterfalls, and one to meteors, planets, our galaxy, our galaxy cluster, then the Universe Itself. Kinda puts in perspective how small we are....

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