Izumi and the kids are away in Japan for a month so Tyler could attend the last few weeks of Japanese kindergarten and hopefully pick up some of the language – a bit of an experiment. Before he left he asked me why things get smaller when they move further away into the distance. Good question – I had to think about that one for a bit. My answer was that if they didn’t get smaller, they wouldn’t fit.

Any other ideas?

UPDATE: Mie put the question to Dr. Hal