The Big Bang singularity refers to a point of infinite density and temperature at t=0. Classical physics cannot describe it; quantum gravity is required. It’s the ultimate frontier for theoretical physics. Singularity theories predict that all spacetime, matter, and energy were compressed into a single point. Understanding it could unify general relativity and quantum mechanics. It’s as close as we get to the universe’s “birth certificate.”
It matters because the singularity represents the origin of all matter and energy.
It also drives research into a quantum theory of gravity.
The universe started as a singularity, a point beyond current physics.
Perimeter Institute [perimeterinstitute.ca]