'Rocky and Bullwinkle' Creator Dies at 90

Alexander Anderson Jr. was battling Alzheimer's disease.

Cartoon artist Alexander Anderson, who created Rocky the flying squirrel and Bullwinkle the Moose, has died at age 90.

His son, Terry, confirmed Anderson had long battled Alzheimer's disease. He died at a nursing home near Pebble Beach, Calif.

Anderson also created the low budget Crusader Rabbit, Rags the Tiger and Dudley Do-Right of the Mounties with a fraternity brother from the University of California, Jay Ward.

Crusader Rabbit was the first animated TV series in the 1950s, according to the Associated Press.

Rocky and His Friends premiered on ABC in 1959.