25 September

This vacuum cleaner isn't 'sucking' this bowling ball off the ground. The entire atmosphere of the Earth is *pushing* the ball onto the end of the vacuum cleaner. Just as you don't suck in air, when you breathe in it's actually the atmosphere pushing the air into you. This all matters a lot because I think the body moving - exercise, again - is not something you 'do' either. More on that in later posts, for my interest at least.