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 …

The Hubble tension has now grown to a level of significance which can no longer be
ignored and calls for a solution which, despite a huge number of attempts, has so far eluded …

The Λ CDM model provides a good fit to most astronomical observations but harbors large
areas of phenomenology and ignorance. With the improvements in the precision and …

New physics increasing the expansion rate just prior to recombination is among the least
unlikely solutions to the Hubble tension and would be expected to leave an important …

Local H_0 determinations currently fall in a window between H 0∼ 70 km/s/Mpc (TRGB) and
H 0∼ 76 km/s/Mpc (Tully-Fisher). In contrast, BAO data calibrated in an early ΛCDM …

The current discrepancy between the Hubble constant, H 0, derived from the local distance
ladder and from the cosmic microwave background is one of the most crucial issues in …

A 10% difference in the scale for the Hubble parameter constitutes a clear problem for
cosmology. Here, considering angular distribution of type Ia supernovae (SN) within the …

We use the ages of old astrophysical objects (OAO) in the redshift range 0≲ z≲ 8 as
stringent tests of the late-time cosmic expansion history. Since the age of the Universe at any …

We explore the prospects for direct detection of dark energy by current and upcoming
terrestrial dark matter direct detection experiments. If dark energy is driven by a new light …