There are a couple of big round rocks outside the InterContinental Hotel on North Terrace.
Apart from an interesting subject they reminded me of a line from a Douglas Adams book ...
"We’ll be saying a big hello to all intelligent lifeforms everywhere and to everyone else out there, the secret is to bang the rocks together, guys." - "The Hitchhiker’s Guide to the Galaxy," Douglas Adams
Perhaps these are a little big for any any earthly lifeforms but who knows out there in our galaxy and beyond could use a little help because ...
"Space is big. You just won't believe how vastly, hugely, mind- bogglingly big it is. I mean, you may think it's a long way down the road to the chemist's, but that's just peanuts to space." - "The Hitchhiker’s Guide to the Galaxy,"
My apologies to to all those out who are not Douglas Adams fans, you will need smaller rocks.
Photo: Robert Rath, 'Banging The Rocks Together', 6.0s f/16 ISO640 15mm