Kathryn: I figure I’ve done my bit this week by linking to that exploding

whale story. So now I’m leavin’ on a jet plane for Columbus, Ohio. Back

Saturday. I’ll be hobnobbing with mathematicians, so I’ll see if I can get

them to resolve the penguin business. Supposing the center of gravity of a

penguin is at height h above the ground, and the velocity of the approaching

plane is v,….