Photo By Tom Mangelsen by Louisa Willcox Grizzlies are emerging from their winter isolation as most people den up in this strangest of times. More cautious than males, mother bears with new cubs are just now stirring after five months of seeming death. We cannot help but be curious about what goes on deep inside a bear’s den. As we hole up, the bear’s ability to survive 150-180 days without eating, drinking or eliminating waste seems all the more miraculous. A groggy bear mo