A mutagen (Latin, roughly change maker) is an agent that changes the genetic information (usually DNA) of an organism and thus increases the number of mutations above the natural background level. Mutagens can be chemical compounds or radiation.
There are several methods to detect how mutagenic an agent is:
... commonly referred to as Dead Heads[?], would follow the band on tour. In contrast to many other bands, the Grateful Dead encouraged their fans to tape their shows. For ...