[longshadow]

cyclical turtles-all-the-way-down cosmological space-time place-moment marker

[RightWhale]

space-time place-moment marker

You are here, but if you weren't, how would you know?

[edwin hubble]

Thanks for the ping, longshadow.

I love Hawking's turtle story. It is told as a true anecdote.
Fascinating thing about the natural sciences is that there seems to be an infinite array of surprises and mysteries laid out before us ...