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=== The Possibility of Quantum Gravitation ===

=== The Possibility of Quantum Gravitation ===

During the era when Newtonian gravity was preeminent, gravitation was considered to be one of the "fundamental forces of nature," along with electricity, magnetism and the strong and weak nuclear forces. Over the years, this interpretation has fallen out of favor, for a variety of reasons. Research into [[electrodynamics]] revealed the electric and magnetic forces to be two aspects of the same thing, and [[quantum mechanics]] described the strong and weak forces in terms of interactions mediated by [[Boson|bosons]]. Further research into [[quantum chromodynamics]] and the [[Standard Model]] increased our understanding of how electromagnetism and the nuclear forces work, but gravitation remained a thing apart.

During the era when Newtonian gravity was preeminent, gravitation was considered to be one of the "fundamental forces of nature," along with electricity, magnetism and the strong and weak nuclear forces. Over the years, this interpretation has fallen out of favor, for a variety of reasons. Research into [[electrodynamics]] revealed the electric and magnetic forces to be two aspects of the same thing, and [[quantum mechanics]] described the strong and weak forces in terms of interactions mediated by [[Boson|bosons]]. Further research into quantum chromodynamics and the [[Standard Model]] increased our understanding of how electromagnetism and the nuclear forces work, but gravitation remained a thing apart.

Over the past few decades, attention has been turned toward formulating a [[Quantum gravity|quantum field theory of gravity]] which would describe the gravitational interaction in terms of a mechanism similar to the electromagnetic, strong and weak nuclear interactions.

Over the past few decades, attention has been turned toward formulating a [[Quantum gravity|quantum field theory of gravity]] which would describe the gravitational interaction in terms of a mechanism similar to the electromagnetic, strong and weak nuclear interactions.

Physicists do not universally agree that a quantum theory of gravity is inevitable, or even possible. Einstein's theory of gravitation described gravity in a way that is so fundamentally different from the other interactions in nature that many physicists no longer gravity to be a force at all. Rather, under the Einsteinian interpretation, gravitation is an inherent property of spacetime and has no analogue at the quantum level at all. Other physicists believe that the Einsteinian interpretation is merely a useful large-scale approximation of an interaction which we have not yet detected on the subatomic scale.

Physicists do not universally agree that a quantum theory of gravity is inevitable, or even possible. Einstein's theory of gravitation described gravity in a way that is so fundamentally different from the other interactions in nature that many physicists no longer gravity to be a force at all. Rather, under the Einsteinian interpretation, gravitation is an inherent property of spacetime and has no analogue at the quantum level at all. Other physicists believe that the Einsteinian interpretation is merely a useful large-scale approximation of an interaction which we have not yet detected on the subatomic scale.

To date, no satisfactory theory of quantum gravity has been advanced, but research continues.  

To date, no satisfactory theory of quantum gravity has been advanced, but research continues.

==External Links==

==External Links==