ASTROSPHEAR

If there had been exactly equal amounts of matter and antimatter after the Big Bang they would have collided and annihilated each other releasing enormous amounts of energy in the form of radiation. Every particle of matter would have met its antimatter counterpart leaving almost nothing behind except photons and other particles produced during the annihilation.

Without the tiny excess of matter that scientists believe existed in the early universe stars planets galaxies and life might never have formed. The universe could have been filled mostly with radiation instead of the cosmic structures we see today. The biggest mystery is why matter survived in greater amounts than antimatter and that question remains one of the greatest unsolved puzzles in physics.

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