Fascinating physical visualizations

I love poring over this gallery of physical visualizations. Each artifact is a representation of data from our history dating back to Mesopotamian Clay Tokens from 5500 BC. Some of them are so interesting and beautiful, like the brainwave weaving of dreamers, or this Yakima Time Ball meant to record major life events. Others are useful like this abacus ring from the Qing Dynasty, or mysterious, like South American Quipus. Maybe not useful, but really cool are these 3D-Printed Thoughts. There’s currently 370 artifacts listed — all of them equally captivating. — CD