Spent the day at Boulby Underground Lab near Whitby - 1.1km underground. Dark matter searches, neutrino physics, very low cosmic ray and background radiation suitable for (amongst many other things) quantum computing. It’s a pretty unique facility and the mine is remarkable - over 100km of tunnels!

And one last picture of my cat, just to round off this initial short series of physics and cat posts, this time with my radiator also in shot.

Here’s a picture of my cat asleep with its feet on its head. I can’t do this.

I’ve been lecturing today at Manchester - special relativity - and for no good reason other than I want to post stuff here, here’s my lecture notes introducing the concept of invariant mass :-)