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Supergiant stars are beasts! Their life is a fight between gravity pushing in and heat pushing out. They fuse heavier and heavier elements in their core until they get to iron. They can’t fuse any more. Iron absorbs more energy than it returns, so gravity takes over. The star’s core collapses and the star dies in an explosive supernova that outshines its entire galaxy.
The heat of a supernova fuses new elements during the explosion, which are then spread out into space via the nebula remnant. Nebulae are the birthplaces of new stars and solar systems.
The iron in your blood came from one of the most powerful explosions in the universe.
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