Watch Wasps Build Their Nest in a Window

A colony of wasps have constructed their nest on a window, offering an amazing cross section view of their inner workings. 

YouTube user Vang Tsal captured a video of the colony building the large structure against a double-paned window (which can't be opened, thankfully) in the attic of his house, as described on reddit. Here's the video: 

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h/t io9