On March 27, David P. Landau, Distinguished Research Professor of Physics and director of the Center for Simulational Physics, presented an invited plenary talk at the spring meeting of the German Physical Society in Regensburg, Germany. His talk was entitled “Spin Dynamics Simulations of Excitations and Critical Dynamics in a Heisenberg Antiferromagnet: Resolution of a controversy via finite size scaling.” The presentation was part of the Symposium on Finite-Size Effects at Phase Transitions. This meeting is the largest annual gathering of the German Physical Society with more than 4,000 participants.