Cold agglutinin disease. Cold agglutination - at body temperature, the antibodies do not attach to the red blood cells. At lower temperatures, however, the antibodies react to Ii antigens, bringing the red blood cells together, a process known as agglutination.
American Robin (Turdus migratorius). The robin red breast was designated as the state bird of Michigan by House Concurrent Resolution No. 30, the Senate concurring, on April 8, 1931.
About Michigan. The Wolverine State (its nickname) is divided into the Upper and Lower Peninsulas, which were physically separated from one another until the construction of the Mackinac Bridge in 1957 provided easy access from one section to the other.