New research suggests that dark energy isn't needed to explain the acceleration in the expansion of the universe — instead ... acoustic oscillations — patterns in the distribution of galaxies ...

Invisible dark matter makes up most of the mass in the universe, far outweighing the amount of matter we can see. | Credit: Dark matter, R. Caputo et al. 2016; background, Axel Mellinger ...

Scientists challenge the existence of dark energy. They suggest the universe's accelerating expansion is due to uneven gravitational effects on time. This new theory, called the "timescape" model ...

The nature of dark matter is largely unknown, but it is thought to have mass, which influences particle interactions in the universe through gravity. Dark matter may not interact much with visible ...

There might not be a mysterious 'dark' force accelerating the expansion of the Universe after all. The truth could be much stranger – bubbles of space where time passes at drastically different rates.