Right, well the weekend was fun.

We went to Cambridge which, while only 48mins away on the train, felt like an adventure in these coronaviral times. The world has shrunk to a plague-stricken village, while at the same time growing to inaccessible dimensions.

The proximate cause of the adventure was a 50th birthday party (thanks Ben and Esther!). I don’t know how this happened, but people who are younger than me are now achieving their half century. Even my little brother made it earlier in the year.

At the party I felt much younger than my calendar age. The morning after, I felt somewhat older, and probably looked it while doing the Cosmic Shambles thing from our hotel room. We discussed amongst other things, Steven Weinberg’s contributions to the foundation of the Standard Model. He did this the year I was born – roughly fifty years ago. Or, as they seem to be calling this these days “nearly fifty-five”. Dammit.

All of this segues nicely into another BBC Science Focus answer I wrote, to the question What day of the week did the Big Bang happen?

See, even the universe is vague on this kind of thing.