In a conservation catch-22, efforts to save quolls might endanger them
After 13 generations isolated from predators, the northern quoll lost its fear of them
![two northern quolls](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2018/06/060618_lr_quoll_feat.jpg?fit=860%2C460&ssl=1)
UNAFRAID Conservationists isolated a population of northern quolls, such as these pictured, on a predator-free island to attempt to build back their numbers. After 13 generations, the quolls lost their fear response to predators.
Jonathan Webb