Looking at quantum gravity in a mirror
Einstein's theory of gravity and quantum physics are expected to merge at the Planck-scale of extremely high energies and on very short distances. At this scale, new phenomena could arise. However, the Planck-scale ...
Why we've got the cosmological constant all wrong
In the early universe, rapid expansion or something very weird
(PhysOrg.com) -- The widely-accepted theory of cosmic inflation states that our universe expanded rapidly in the moments after its birth, resulting in the immense expanse we see today.
Repulsive gravity as an alternative to dark energy (Part 2: In the quantum vacuum)
Physicists propose test for loop quantum gravity
Four reasons why the quantum vacuum may explain dark matter
One clock with two times: When quantum mechanics meets general relativity
The unification of quantum mechanics and Einstein's general relativity is one of the most exciting and still open questions in modern physics. General relativity, the joint theory of gravity, space and time ...
Escaping gravity's clutches: The black hole breakout
New research by scientists at the University of York gives a fresh perspective on the physics of black holes.
Probing the laws of gravity: A gravity resonance method
Quantum mechanical methods can now be used to study gravity: At the Vienna University of Technology (TU Vienna), a measurement method was developed, which allows to test the fundamental theories of physics.
Physicists investigate fate of five-dimensional black strings
Physicists develop model that pushes limits of quantum theory, relativity
All of the matter in the universe -- everything we see, feel and smell -- has a certain predictable structure, thanks to the tiny electrons spinning around their atomic nuclei in a series of concentric shells or atomic levels. ...
Time travel theory avoids grandfather paradox
Revised theory of gravity doesn't predict a Big Bang
Planck Mission: Space Probe Peers Into Dark Cosmos
(PhysOrg.com) -- Imagine watching the birth of the universe -- the Big Bang -- from the outside. What would you have seen?