The toothpick is the oldest dental cleaning tool around. Fossils of 7,500-year-old teeth indicate that humans were using wooden sticks to clean their teeth well before the advent of toothbrushes. …
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“Materials and Mechanisms for Amorphous Robotic Construction,” by Nils Napp, Olive R. Rappoli, Jessica M. Wu, and Radhika Nagpal from Harvard University and Worcester Polytechnic Institute, was presented at the …