Discovery Communications’ production house Discovery Studios has signed a long-term deal with leading producer of factual programming Rob Hammersley. He  joins the company in an exclusive deal as development executive and executive producer to create programming for the West Coast arm of Discovery Studios. Hammersley has executive produced such series as Discovery Channel’s Mythbusters, American Chopper and Weaponizers, Animal Planet’s Tanked and TLC’s Extreme Poodles.