2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/207539Motivated by higher-dimensional theories that predict new effects, we tested the gravitational 1/r^2 law at separations ranging down to 218 micrometers using a 10-fold symmetric torsion pendulum and a rotating 10-fold symmetric attractor. We improved previous short-range constraints by up to a factor of 1000 and find no deviations from Newtonian physics.4 pages, 5 figuresHigh Energy Physics - Phenomenologytext