Thanos, the fierce Titan on a crusade to collect the Infinity Stones.
Thanos was born on Saturn's moon Titan. He carries the so-called Deviants gene, which gives him his distinctive physical appearance. Using his exceptional scientific skills, Thanos enhanced his own physical strength and abilities.
As he grew, Thanos changed from a peace-loving boy to a death-obsessed adult. This obsession led to him launching a nuclear attack on Titan, which killed millions. This event convinced him of the perverse idea that he must destroy half the life in the entire universe in order to save it.
To accomplish this aim, he sets out on a quest to gather the 6 Infinity Stones. As he collects each one, he places it in the Infinity Gauntlet he wears on his left hand. He succeeds in gathering all 6 Infinity Stones – and proceeds with his apocalyptic ambition.