A study conducted by Rajendra Gupta professor of physics at the University of Ottawa, suggested that dark energy might not be required to explain the workings of the universe. 

Scientists have claimed that the universe is only 27 billion years old and does not have any dark matter. 

The research is based on a model that combines 2 theories: ‘tried light’ (TL) and ‘covarying coupling constants’(CCC). 

The CCC theory casts doubt on the notion that fundamental constants of nature, such as the charge of an electron or the speed of light, are unchangeable.

The "Tired Light" theory states that light loses energy over large distances, resulting in redder wavelengths and obviating the need for the cosmos to expand.

These two models together provide a new framework for understanding cosmic phenomena.

Scientists on dark matter and the universe

“The study’s findings confirm our previous work, which suggested that the universe is 26.7 billion years old, negating the necessity for dark matter’s existence,” Gupta explained

He further added, “Contrary to standard cosmological theories where the accelerated expansion of the universe is attributed to dark energy, our findings indicate that this expansion is due to the weakening forces of nature, not dark energy,” 

According to his findings, the new model changed the facts about the universe.

A major part of his research focused on “redshifts" in which light stretches to the red end of the spectrum while traveling through space. After analyzing data on the distribution of galaxies at low redshifts and the patterns seen in the early universe at high redshifts, he claimed that dark matter did not exist.