At the farthest limits of the observable universe lies a boundary defined by the oldest light that exists. Scientists can detect it, measure it, and map it, but they cannot go beyond it or see what ...

Since conventional explanations have failed to pony up dark matter, one physicist is looking towards the unconventional. In a series of two papers, physicist Stefano Profumo of the University of ...

This video explores what scientists mean when they talk about the edge of the observable universe. Using real observations and established physics, it explains why space appears black beyond a certain ...