Updated

When Superstorm Sandy struck a New York hospital four months ago, hundreds of patients were safely evacuated, but mice in a nearby research building were not so lucky.

Thousands of special mice that were used in experiments drowned when the basement of that building flooded. Now, scientists at the NYU Langone Medical Center are pursuing a long, slow effort to replace them.

What the researchers lost in a few minutes one terrible night in October will take more than a year to recover, at a cost of tens of millions of dollars. That's because, for the most part, they can't just buy these mice off the shelf. It will take as long as two years to recreate some types of mice that have specific genetic mutations.