Head and Neck Radiology The radiology subspecialty devoted to the diagnostic imaging and diagnosis of diseases of the head and neck. This includes x-rays, CT (computed tomography or CAT), Ultrasound and MRI. Musculoskeletal Radiology The radiology subspecialty devoted to the diagnostic imaging and diagnosis of the muscles and the skeleton.
What Is Kitty Litter Made Of? Before 1950, kitty litter mostly consisted of sand, dirt or ashes. The first modern kitty litter was created when a neighbor of entrepreneur Edward Lowe asked him for sand for her litter box. Mr. Lowe, whose business created absorbents, convinced his friend to use clay rather than sand.
Many who use non-clumping cat litter find that they need to be replaced the litter and clean the litter box at least once a week. Non-clumping litter is typically made of clay, though there are other types available such as plant-based alternatives (e.g., pine, corn, wheat, beet pulp, and wood). Some people prefer non-clumping litter because it is often less expensive than clumping litter, and others choose it because their cats prefer it.