Scientists suspect that a "fifth force" may be at work in space. This force, which they believe is mediated by a hypothetical particle called a symmetron is responsible for creating invisible walls in ...

Scientists’ current best theories about the arrangement of the cosmos suggest that small galaxies should be distributed around their host galaxies in seemingly random orbits. But observations have ...

One of the biggest challenges to our traditional understanding of the cosmos is something called the "satellite disk problem." In essence, scientists are confused because smaller galaxies orbit larger ...