why is galactus so hungry

Galactus is hungry because he is a cosmic being whose life force depends on consuming vast amounts of energy, primarily from entire planets. His hunger is eternal and primal, as he needs to feed frequently—roughly once a month—to sustain himself and maintain his immense power. His appetite plays a crucial role in the cosmic order of the Marvel Universe, as the energy he absorbs from planets is converted to fuel cosmic cycles, including the birth and rebirth of universes. Galactus is not malicious; his feeding is a necessary part of maintaining multiversal balance, converting matter into energy to help generate the Big Bang that signals the creation of new universes. Despite this endless hunger, he has tried to limit his feeding to uninhabited worlds and has occasionally allied with heroes to protect certain planets, including Earth. In essence, Galactus' hunger is a fundamental cosmic function tied to his existence as a force of life, death, and rebirth across the multiverse.