Starfleet records. Astronomical phenomena. (4) Transwarp. Underspace: The Underspace is a network of subspace corridors that extended through a large area of the Delta Quadrant, allowing starships to traverse vast distances in a short time. Prior to the 15th century, the Vaadwaur discovered and charted the Underspace, using them to travel throughout the Delta Quadrant, as far as Talax and beyond. Though they engaged in trade and exploration, they also used the corridors to mount lightning raids

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Anatomy of Gastric triangle, Traube’s space & Stomach Bed in details. Special video part 16