Tuesday 5th May 2026, 11.50am (day 5,367)

This is definitely liquid nitrogen (or was, until a second or two previously), as it’s going into the Air Liquide tank next to the Engineering building. All sorts of things might be going on in there, with applications for liquid nitrogen ranging from the preservation of human remains through the digging of tunnels to the making of ice cream. As uni doesn’t have a cookery department, though, it’s probably not the last one. I can’t discount the first.