What is cat litter science?
What is cat litter science? When cat litter was invented in 1947, it was made of grains of absorbent clay called Fuller’s earth. Much of that is still clay litter, but now silica, recycled newspaper, corn, wood, wheat, grass, and nut shells are all processed to make cat litter—clumping and not clumping, scented and unscented. […]