Author(s): Ofek Lauber Bonomo, Itamar Shitrit, Shlomi Reuveni, and Sidney Redner In a minimal model of a pushy random walk, a moving tracer can displace obstacles, giving rise to new diffusive behaviors in both 1D and 2D. [Phys. Rev. Lett. 137, 037101] Published Mon Jul 13, 2026