I've been liking the very visceral way in which Katherine May writes about experiencing gravity. On page 94, she uses an explanation about why there are two tidal bulges that mat be helpful to me. I have never quite managed to understand the physics of tidal forces. She says that the bulge furthest from the Moon is because the force of attraction is weakest there and without a strong attraction the water is not pulled down but piles up. I need to think about that: weaker pull makes for deeper water.
