What is Quantum Gravity?

What is Quantum Gravity?
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Physics presents two versions of our universe. One describes it as space-time: a stretchable fabric that's expanded since time's inception.
The other views it as composed of indivisible elements, uncertain about their location or timing. Both are incredibly accurate but operate on vastly different scales.

Einstein's general relativity governs massive objects and cosmic distances, while quantum physics rules over minute atoms and subatomic particles.
The paradox arises at the big bang, where everything compacted into an infinitesimal point, requiring a unified theory of gravity and the quantum realm.

The elusive answer is quantum gravity, aiming to reconcile the continuous with the indivisible, the predictable with the random.
Despite decades of research, a complete understanding of space-time's origin remains unattained. Most physicists start with quantum physics, quantizing the three natural forces - electromagnetism,strong and weak nuclear forces - into force-carrying elementary particles.

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Видео What is Quantum Gravity? канала Science Time