A new theory from the University of Alaska Fairbanks (UAF) suggests that time, not space-time, may be the true foundation of reality. The idea is that time itself has three dimensions, while space is something that emerges from it rather than being equally fundamental.
The study, published April 21 in Reports in Advances of Physical Science, describes a six-dimensional structure made up of three time dimensions and three space dimensions. This is very different from the standard view of physics, where one dimension of time and three of space combine into spacetime.
According to the paper, the need for three time dimensions comes from the way the universe behaves at three different scales: The first temporal dimension (t₁) functions at the Planck scale, where quantum mechanics governs particle interactions and fundamental processes. The second dimension (t₂) emerges at the interaction scale, mediating between quantum and classical behavior. It plays a role in explaining particle generations and weak interaction asymmetries. The third dimension (t₃) operates at cosmological scales, shaping gravitational effects and the evolution of large-scale structures.
These dimensions are described as natural outcomes of symmetry requirements rather than arbitrary constructs. Their separation by scale explains why everyday experience reflects only a single flow of time (t₁), with t₂ and t₃ becoming apparent only under extreme conditions. The framework further suggests that time itself may form the universe’s fundamental fabric, with mass and energy arising as expressions of temporal curvature and dynamics. This perspective reverses the conventional view, proposing that matter is not situated in time but is instead a property of time’s multidimensional structure.
The framework is designed to extend quantum mechanics and field theory while still keeping important principles like causality and unitarity intact. Earlier attempts to describe three-dimensional time, such as in Kaluza–Klein theory, were mostly abstract math without clear experimental predictions. This new approach, however, provides a full particle spectrum and makes specific predictions that can be tested.
The model has already shown it can reproduce known particle masses with striking accuracy. For example, it calculates the top quark (quark = fundamental unit of matter) at 173.21±0.51 GeV, which matches the measured 173.2±0.9 GeV. It also matches the muon (muon = similar to electron but much heavier) at 105.6583745±0.0000024 MeV compared to the measured 105.6583755±0.0000023 MeV, and the electron at 0.5109989461±0.0000000031 MeV, exactly in line with the measured value.
Building on this, the theory predicts neutrino masses (ν3: 0.058±0.004 eV, ν2: 0.0086±0.0003 eV), new resonances at 2.3±0.4 TeV and 4.1±0.6 TeV, and even a tiny change in the speed of gravitational waves, Δv/c = (1.5±0.3)×10⁻¹⁵. These predictions could be tested in the near future by collider experiments, gravitational wave detectors, and cosmological surveys expected between 2025 and 2030.
The theory also offers possible answers to long-standing physics puzzles. The three particle generations appear naturally from temporal symmetries. Weak interaction parity violation, a feature of particle physics, is explained as a geometric property of time. Quantum gravity, which usually runs into problems with infinite corrections, is shown here to have finite corrections. Importantly, General Relativity still emerges as a special case when two of the time dimensions are negligible, so the new theory does not discard Einstein’s work but builds on it.
The larger goal is to help bridge the gap between quantum mechanics and general relativity, two powerful but currently incompatible theories. By reproducing particle masses and offering testable predictions, this three-dimensional time model could be a step toward the long-sought “theory of everything.”
While the idea is still outside mainstream physics, its mathematical consistency and predictive power suggest it may deserve serious attention as a possible new way of understanding the universe.
Source: UAF, World Scientific Connect
This article was generated with some help from AI and reviewed by an editor. Under Section 107 of the Copyright Act 1976, this material is used for the purpose of news reporting. Fair use is a use permitted by copyright statute that might otherwise be infringing.