Riko once asked Nansen to explain to him the old problem of the goose in the bottle. If a man puts a gosling into the bottle, he said, and feeds the gosling through the bottle’s neck until it grows and grows and becomes a goose – and then there is simply no more room inside the bottle, how can the man get it out without killing the goose or breaking the bottle? RIKO! shouted Nansen, and gave a great clap with his hands. Yes master! said Riko with a start. See! said Nansen. The goose is out!