evolving bacteria

http://www.newscientist.comThere has been a new bacteria that was found this year that has evolved enough to survive through a lot of experimenting.  The bacteria that was found was called   EF-Tu.  This bacteria is similar to E. coli but if you but if you would try to mutate it, it would not be effected but any of the partners near it would get hit instead.  This has just been recently discovered, but it is expected to have been evolving for about 500 million years.