Autocron

A humanoid race with blue-black skin, two-toed feet, and an average height of 6'5". Their bodies are iron-based rather than carbon-based, and they possess superhuman strength and durability. Their government is a technocracy (and their level of technology is superior to that of Earth), ruled by a world-computer; their culture is imperialistic, militaristic, and orderly. They are native to Cron, the sixth planet orbiting Betelgeuse; Cron possess a gravity and atmospheric density almost three times greater than Earth's, and the atmosphere has a high methane content. Cron is rich in metallic ores and only has 4% surface water; mechanized cities cover 85% of the planet. They were first seen in Machine Man #3 (Jun 1978).