This is an amazing observation. It's not terribly difficult to work out the numbers once it's been pointed out, but I'm not sure if I'd have come up with it on

This is an amazing observation. It's not terribly difficult to work out the numbers once it's been pointed out, but I'm not sure if I'd have come up with it on my own. For others who like this sort of thing, I highly recommend Isaac Arthur's YouTube channel: http://m.youtube.com/channel/UCZFipeZtQM5CKUjx6grh54g http://m.youtube.com/channel/UCZFipeZtQM5CKUjx6grh54g