It was possible because she collapsed on a porch rather than in a field, giving her body a slightly more sheltered microenvironment than it might otherwise have had.

It was possible because Wally Nelson opened his door.

It was possible because he drove to the hospital.

It was possible because Dr.

Sather chose to treat rather than to accept the apparent death.

It was possible because the heating pads raised the temperature gradually enough that the recovery of cardiac function preceded the dangerous influx of cold peripheral blood that might otherwise have triggered a fatal arrhythmia.

Each of these factors was necessary.