In early March, thousands awaited news of the fate of a single nest. Logging into live stream pointed at an active Bald Eagle nest at Codorus State Park in southern Pennsylvania, viewers awaited news of the fates of two adult eagles incubating eggs after a wintry squall had dumped up a half-foot of snow on the park the night before; it was enough to cover up the mother eagle right up to her neck. Onlookers bit their nails: Would the parent eagles freeze? Was it even possible for them to swap places? Would the eggs survive?