The Avengers Movie Wiki

Project P.E.G.A.S.U.S.

Project P.E.G.A.S.U.S. is a subterranean research facility.

The Avengers

The subterranean Project P.E.G.A.S.U.S.  facility is where the Tesseract is being studied by Erik Selvig. It proceeds to collapse when a portal opened by the cube from which Loki Laufeyson came from implodes.