Spacetime torsion: The end of major cosmological problems?

A cosmologist has shown that an already existing extension of general relativity may eliminate major problems in gravitational physics, and answer major questions in cosmology.
The Einstein–Cartan–Sciama–Kibble (ECSK) theory of gravity naturally extends general relativity to account for the intrinsic angular momentum (spin) of elementary particles. This theory, named after Albert Einstein, Élie Cartan, Dennis …

Cosmological anomaly in the distant Universe?

Researchers have found that the Universe appears to be clumpier than predicted. This clumpiness, if not due to systematics, might be evidence that the standard model of cosmology needs to be rewritten.
Imagine yourself leaving Earth and looking at it as you are going further and further. You would first see …

Through the looking glass – A cosmic parity violation?

Astrophysicists have always assumed that our Universe has a “mirror” symmetry. Researchers are now trying to test this assumption, and their first results show that our Universe might not be exactly as expected.
In a Universe with a mirror symmetry, the image of a counter-clockwise rotating galaxy is a galaxy with …

Is dark matter an illusion?

A researcher has suggested that dark matter might simply be an illusion, rather than some unknown non-baryonic matter. Assuming that antimatter has a negative gravitational charge, the “illusion” would be explained by the resulting gravitational polarization of the quantum vacuum by ordinary matter.
The need for dark matter first appeared with …

You thought black holes were strange? Think again.

One of the great challenges of modern physics is to reconcile quantum mechanics and relativity. Black holes are an excellent example of the incompatibility between the two theories, and quantum theorists have proposed various alternatives. While they all remain purely hypothetical, they also all seem much weirder than black holes …

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