Edible cat litter for drug delivery – Having published a bog about bulldogs and cats, seems quite apt that I was also writing recently about kitty litter the main component of which is the absorbant mineral sepiolite. Sepiolite has been known since Roman times when it was used to filter and purify wine, today it's commonly found in cat litter trays. It absorbs huge amounts of liquid as it is so porous although a detailed understanding was missing. Now, an X-ray study could help explain why and perhaps lead to more technological applications, such as the development of food binders and drug-delivery agents.