Eight centuries after Fibonacci posed his famous rabbit problem as a mathematical curiosity, modern statistical modeling has returned to that same question with biological precision — and the results are humbling. Starting from a single breeding pair under ideal conditions, the numbers climb from 1,182 in the first year to 345,000 in the second, a trajectory that illuminates not just rabbit fertility, but the ancient tension between mathematical possibility and the constraints that living systems quietly impose. The phrase 'breeding like rabbits' turns out to be less a description of what rabb