Colu

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Colu is a fictional planet in DC Comics whose primary inhabitants are green-skinned humanoid beings. However, the ultimate power on Colu is wielded by the Computer Tyrants, a race of ruthless machines.

In the pre-Crisis DC Universe of Earth-One, the Tyrants sent the android Brainiac into space to find suitable targets. To perpetrate the illusion that Brainiac was Coluan, a young Coluan named Vril Dox was sent along and instructed to pose as Brainiac's "son". Dox rebelled against the tyrants and freed Colu. He was the ancestor of Brainiac 5 of the Legion of Super-Heroes.

In the Post-Crisis DCU, Colu was still ruled by the Computer Tyrants. However, they did not create a Brainiac android. Instead they created Brainiac inadvertently when they sentenced the rebellious scientist Vril Dox to death, and his consciousness somehow found its way to Earth. His cloned lab assistant, Vril Dox II, eventually overthrew the Computer Tyrants, with the aid of the various heroic aliens who became L.E.G.I.O.N.. The Computer Tyrants downloaded themselves into a robot body, apparently going on to become Pulsar Stargrave.

Brainiac subsequently returned to Colu and conquered it, but was defeated by L.E.G.I.O.N. and Superman.

In the 30th century setting of the Legion of Super-Heroes, Colu is famous for the incredible intellects of its inhabitants. The most brilliant, but most erratic, are still considered to be the Dox family.

After the Zero Hour reboot, it was revealed that most Coluans prefer purely theoretical research, and found Brainiac 5's interest in experimentation disturbing. It was later revealed that, following their experience with the Computer Tyrants, the Coluans had a prejudice against artificial life.

In Mark Waid's Legion reboot, Colu uses its shrinking technology (pioneered by the original Brainiac) to make maximum use of its surface area. It is sometimes known as the "Bottle Planet of Colu".