Science Daily (Jan. 3) -- Using atomic quantum-simulation, an experimental technique involving finely tuned lasers and ultracold atoms about a billion times colder than room temperature to replicate the properties of a topological insulator, a team of researchers has directly observed for the first time the protected boundary state of the topological insulator trans-polyacetylene. Also: Phys.Org (Jan. 3), ScienceBlog (Jan. 3).