I like to have them wandering around and making me feel that despite being in Greater London, there is a part of wildlife around me that is more impressive than simply mice and rats.
It involves taking a rat kidney and stripping it of its cells, leaving a shell which's then relined with renewed cells from newborn rats and blood vessel running cells from human donors.
A court in Sierra Leone has charged two editors at the Independent Observer newspaper with seditious libel after they published an article comparing the President Ernest Bai Koroma to a rat.
Many studies, especially ones on cancer and gut dysfunction, only found issues in rat studies where the rats were consuming artificial sweeteners at amounts multiple times greater than humans would ever consume.