The universe shouldn't exist, but it does

By all rights of fundamental physics, the universe should be entirely empty. When energy transforms into matter, it always creates matter and antimatter in identical quantities, like twin siblings born at the exact same instant. Bring them back together, and they violently erase each other in a flash of radiation, leaving nothing behind. During the Big Bang, the universe was filled with equal amounts of both. Mathematically, every electron, proton, and neutron in existence had a mirror enemy designed to instantly destroy it. If the rules of reality had played out with complete symmetry, the cosmos would have canceled itself out in the first microsecond, leaving a calm, lifeless ocean of pure light.

Yet here you are, reading this on a clump of lingering matter. Physicists call this cosmic paradox baryogenesis, and it boils down to a terrifyingly narrow accounting error. For every billion particles of antimatter created in the primordial fire, the universe somehow produced one billion and one particles of regular matter. When the great annihilation swept through the young cosmos, almost everything vanished. All the galaxy clusters, stars, black holes, planets, and human beings that will ever exist are constructed from that lonely, single leftover particle out of every billion. You are not the rule of physics; you are the rounding error that survived.

To explain how this asymmetry happened, Soviet physicist Andrei Sakharov realized in 1967 that reality must break its own symmetry rules under three specific conditions. First, reactions in the early universe had to favor matter over antimatter. Second, physics had to violate what is known as Charge-Parity symmetry—meaning physical laws must behave slightly differently if you swap a particle with its antiparticle and flip space upside down. Third, this had to happen during a chaotic phase where the universe cooled down faster than subatomic particles could reach thermal equilibrium. Experiments in particle colliders have confirmed that nature does indeed break this symmetry, particularly in heavy subatomic particles called B mesons, proving that the laws of physics are subtly rigged in favor of stuff existing.

Even if you strip away all matter and antimatter, the concept of absolute nothing turns out to be a physical impossibility. In quantum mechanics, a complete vacuum is never truly empty. Instead, it boils with quantum vacuum fluctuations—a ceaseless froth where virtual particles and antiparticles pop into existence out of the void, borrow energy from nothing, annihilate, and disappear in fractions of a trillionth of a second. The ground state of reality is inherently unstable. Nothingness is not a quiet state of peace; it is an uncomfortable, twitchy balance waiting for the slightest nudge to spill over into something permanent.

When cosmic inflation exponentially stretched the universe in its first fraction of a second, those quantum twitches were ripped apart before they could recombine. Tiny quantum fluctuations were stretched across billions of light-years, turning microscopic instabilities into the vast cosmic web of matter we see today. Cosmologists suspect that a phase transition—much like steam condensing into liquid water—froze this tiny imbalance into place forever, locking in the extra matter before the antimatter could catch up and erase it.

Yet despite these breakthroughs, standard particle physics cannot account for the full scale of the imbalance. Known symmetry violations only explain a tiny fraction of the leftover matter we observe today. Somewhere in the unmapped energy scales of the ultra-early universe—perhaps tied to hypothetical super-heavy neutrinos or undiscovered dark matter forces—lies a hidden mechanism that tipped the scale just enough to build a reality. Physics can trace the story back to the first sliver of a second, but it hits a hard wall when asking why the rules favor existence over an absolute void.

The universe is not an intentional masterpiece; it is a chaotic stain on an otherwise spotless void, and every breath you take relies on a subatomic glitch that physics still cannot fully explain.