Mice have evolved immunity to poison in a very unusual way

For anyone who has to deal with rodent infestations, getting rid of the small, gnawing animals can be rough — so much so that many people immediately head for poison. However, it's not quite as easy as that. Some mice have obtained immunity to Warfarin, a common rodent poison, via a very unusual route: horizontal gene … » 7/21/11 12:30pm 7/21/11 12:30pm