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The bears of Churchill surely seem to know where home is. When they get too unruly or threatening, they are sometimes tranquilized, caged and flown to isolated regions several hundred miles away. But after a week or so, some of the deported bears inevitably show up in Churchill again, having trekked back at speeds up to 30 miles a day. Next year Churchill plans a different tactic: obstreperous bears will simply be locked up for a few weeks in sturdy concrete-and-steel cages inside an abandoned Quonset hut. During their brief captivity, they will need no care other than some watering. Finally, when Hudson Bay starts freezing and the bears begin to think passionately about chasing seals on the ice, they can be safely released. —By Frederic Golden. Reported by Ed Ogle/Churchill