Abstract The standard Λ Cold Dark Matter (ΛCDM) cosmological model provides a good
description of a wide range of astrophysical and cosmological data. However, there are a …

A number of challenges to the standard Λ CDM model have been emerging during the past
few years as the accuracy of cosmological observations improves. In this review we discuss …

Teleparallel gravity (TG) has significantly increased in popularity in recent decades, bringing
attention to Einstein's other theory of gravity. In this Review, we give a comprehensive …

A gravitational anomaly is found at weak gravitational acceleration g N≲ 10− 9 ms− 2 from
analyses of the dynamics of wide binary stars selected from the Gaia DR3 database that …

The LIGO and VIRGO Collaborations have recently announced the detection of gravitational
waves from a neutron star–neutron star merger (GW170817) and the simultaneous …

A century ago, Einstein formulated his elegant and elaborate theory of General Relativity,
which has so far withstood a multitude of empirical tests with remarkable success …

The understanding of stellar structure represents the crossroads of our theories of the
nuclear force and the gravitational interaction under the most extreme conditions observably …

Over the last years some interest has been gathered by f (Q) theories, which are new
candidates to replace Einstein's prescription for gravity. The nonmetricity tensor Q allows to …

A bstract We study constraints from causality and unitarity on 2→ 2 graviton scattering in four-
dimensional weakly-coupled effective field theories. Together, causality and unitarity imply …

Theories of modified gravity, where light scalars with non-trivial self-interactions and non-
minimal couplings to matter—chameleon and symmetron theories—dynamically suppress …