The scientists who went poking around a Primal ship graveyard and started galactic history.
Mentioned once, in Mordecai's account of why a rail line is called Escape Velocity. After the Escape Velocity found the wormhole to the first system, it was a Gleener scientific crew — investigating a Primal ship graveyard — that came across the Vog Generation Ship. Nothing else is said about them, which in the Syndicate's telling is apparently enough.
The scientific expedition at the origin of Syndicate history.