I must be losing my sense of time as result of spending most of everyday communicating  with colleagues via my laptop because I published today’s post yesterday [see ‘Professor soars through the landscape‘ on April 27th, 2020].  Even when a helpful reader pointed out that the accompanying video had not been published, I simply thought that I had failed to synchronise the post and video properly – see my comment on yesterday’s post.  It was not until my editor asked me why I had published a post on Tuesday that I realised my error. Perhaps I am suffering from dyschronometria brought on by the COVID-19 lock-down in force in the UK.