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Ectobiology labs are laboratories located in one of the many asteroids in the Veil, and presumably exist in each session of Sburb. They are accessed through a number of transportalizers across the separate Planets.
The laboratories contain numerous large, clear tubes holding things resembling massive Chess pieces. According to Karkat, these machines are used to genetically engineer soldiers and Agents for both Prospit and Derse, using the "EXOTIC MENAGERIE OF CHESS PIECES ON THE BATTLEFIELD" in order to perpetuate the war.

They also contain everything needed to preform ectobiology, including a Sburb computer terminal, as in unscratched sessions one player will have to take care of actually creating themselves and their teammates through ectobiology. There is a session glitch that will move this process into a scratched session though.