The Geometric Computation Group, headed by Professor Leonidas Guibas, addresses a variety of algorithmic problems in modeling physical objects and phenomena, and in computation, communication, and sensing as applied to the physical world. Current foci of interest include geometric modeling with point cloud data, deformations and contacts, sensor networks for lightweight distributed estimation/reasoning, and modeling the shape and motion biological macromolecules and other biological structures. More theoretical work is aimed at investigating fundamental computational issues and limits in geometric computing and modeling.