Daily Mail: In 2005 Laura Mersini-Houghton of the University of North Carolina at Chapel Hill and Richard Holman of Carnegie Mellon University suggested that evidence for the existence of other universes would be found in the cosmic microwave background radiation. Early mapping efforts using the Wilkinson Microwave Anisotropy Probe appeared to support some of their claims. Now Mersini-Houghton says that the highly detailed Planck map of that radiation, released in March, provides clear support for their hypothesis. She believes that the apparent imbalance in movement and structure and the presence of a cold spot are signs that there are sources of gravity external to our own universe. However, an earlier evaluation of the Planck data showed no evidence of “dark flow.”