Convection is the process in which heat is carried by parcels of moving fluid.
For example, heating a pan of water causes the lowermost layer of fluid to expand and become less dense, making it rise and carry its heat upward. Upcoming article in Phys. For example, big blobs in the CMB map imply a large value for omega, which in turn suggests the universe will collapse. Small blobs imply a smaller omega and an expanding universe. Higher resolution samplings of tiny portions of the CMB, such as that made with the Saskatoon detector in northern Canada, observe blobs at a size that stands midway between that corresponding to an open and shut universe.