Ever wonder what happens when you drop a million grains of sand on top of each other? The picture above represents this, and Alexander McDonough, a graduate student from Brown University, Rhode Island, will be giving a talk on this topic, more specifically the the sandpile groups of graphs. The cardinality of these groups exposes links to sets of spanning trees, and he’ll be showing the canonical ways the elements of the sandpile group of a graph and its spanning trees can be related, along with what limitations these relations must have. Because of the approachability of graph theory, this talk should be understandable by just about anyone! He is also happy to answer questions about life as a graduate student in America after, for those interested.