Likely a sterile medium means an uncontaminated culture (food free of living organisms) that will grow only the new bacteria introduced for analysis. Source(s): http://www.thefreedictionary.com/sterile
Stonepelt was Bluestar's first mentor and a very well-respected senior warrior of ThunderClan. It is revealed in this book that he took her to the Gathering on her second day as an apprentice because she had caught a squirrel very well for a new apprentice, and the squirrel had been as big as she was.
Manmoth is a mutant mammoth who debuted in Teenage Mutant Ninja Turtles Meets Archie #1. In the Origin of the Species story, Manmoth was a caveman who was mutated into a mutant mammoth by Shredder in his plans to use him on the Ninja Turtles.