Muons in a half-shell?

I've been having to write some serious emails of apology since Young Keith got my comments on Evolution and Relativity the wrong way round.

He's made a real mess about the place, and drained all available energy sources with his Chelonocyclotron. And I've no idea where he even got the Giant Tortoises from, but I promise that once they're back down to non-relativistic speeds, they're going to the Galapagos.