"Among the scientists here, there's deep concern about long-term genetic damage to future generations. In an effort to find answers, Dallas, Chesser and Baker use the fields and abandoned villages around Chernobyl to collect and study radioactive mice. "There's certainly enough radiation here to contaminate those mice and cause genetic effects that we're seeing," observed Dallas. "There's no doubt about that. We just like to know how much it takes before it's a hazard to humans." They run tests on the mice at a nearby makeshift lab, set up in what was once a kindergarten classroom."