Hrothgar, I believe it's all part of the US trade deficit. Penguins are being assidiously imported from the south; the hope is that there will eventually be a self-sustaining population. Not a single polar bear, OTOH, has been sent south, which had been part of the original trade plan. The planners had miscalculated in believing that polar bears come in flocks. As usual Alaska is bearing the brunt of the impact of the mistake.