So at the physics lecture on Saturday night, Savas Dimopoulos talked about parallel universes folded up into higher-dimensional cylinders less than one millimeter away. I couldn’t picture this at all until he threw up a slide showing an elongated s-shape. Two points on different bars of the s might be thisclose together, but if the light has to go many light years around the curve of the s, you wouldn’t necessarily be able to see your near neighbour. What you might be able to feel is gravitational force from an invisible nearby mass.

Lying in bed this morning with Claire spider-monkeying around inside my belly, I decided that she’s in a precisely analogous state. She’s only millimeters away through my abdominal wall, but she’ll have to go the long way around to see the light of day.

Meanwhile I feel gravitational force from an invisible nearby mass.

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