I finally got around to reading Carlo Rovelli's Seven Brief Lessons On Physics. Wonderful, mind blowing book. In it though he expresses doubt that we will last as a species. Given how many species, including our own ancestors, have come and gone - and combined with our current self destructive activities - he's pessimistic.

While showing Penny how to do something online with our finances yesterday I made some comment about it being important that she learn how to do it herself as I won't always be around. She got upset.

I visited my parents at the weekend. They are both in their eighties. Mum used the phrase "when I'm gone" a couple of times in conversation. I have no idea how I will cope when they go.

Life is such an amazing adventure but much of its meaning is down to the fact that it is finite. It comes to an end. How we feel about this, and how this knowledge of our inevitable demise conditions our behaviour while we are here, matters.

And yet we struggle with thinking about it at all, hide it behind hospital doors, pretend it won't happen, and act as if life is a blank cheque.

I was going to make a joke about this, as we usually do, and call this post "A cheery topic for a Monday morning". I decided not to.