Summary:
- The article discusses a new phenomenon called "dark flow" that has been observed in the cosmic microwave background (CMB) radiation, which is the oldest light in the universe.
- Dark flow refers to the apparent motion of galaxy clusters in a common direction that cannot be explained by the standard model of cosmology, suggesting the existence of a previously unknown gravitational force or structure beyond the observable universe.
- The article explores the potential implications of dark flow, including the possibility of a multiverse or the existence of a "dark" sector of the universe that is not directly observable, and the need for further research to better understand this mysterious phenomenon.