Read the full post on my own site here

(this was sent to my mailing-list first; sign-up below if you want more like this, along with other updates)

"Light in a vacuum moves at the speed of propagation of causality," he said.

I looked back at him with a blank expression. I had no idea what that meant.

We were walking past the accident site towards the tents that had been housing the investigation.

Read the full post on my own site here