I overheard a clip on the radio last week in which someone was parodying the quote from Marvin, the Paranoid Android in the Hitchhiker’s Guide to the Galaxy: ‘Here I am with a brain the size of a planet and they ask me to pick up a piece of paper. Call that job satisfaction? I don’t.’ It set me thinking about something that I read a few months ago in Max Tegmark’s book: ‘Life 3.0 – being human in the age of artificial intelligence‘ [see ‘Four requirements for consciousness‘ on January 22nd, 2020]. Tegmark speculates that since consciousness seems to require different parts of a system to communicate with one another and form networks or neuronal assemblies [see ‘Digital hive mind‘ on November 30th, 2016], then the thoughts of large systems will be slower by necessity. Hence, the process of forming thoughts in a planet-sized brain will take much longer than in a normal-sized human brain. However, the more complex assemblies that are achievable with a planet-sized brain might imply that the thoughts and experiences would be much more sophisticated, if few and far between. Tegmark suggests that a cosmic mind with physical dimensions of a billion light-years would only have time for about ten thoughts before dark energy fragmented it into disconnected parts; however, these thoughts and associated experiences would be quite deep.
Douglas Adams, The Hitchhiker’s Guide to the Galaxy, Penguin Random House, 2007.
A couple of weeks ago (‘Only the name of the airport changes’ on June 12th, 2019) I wrote about the stretching and compression of time while I waited for my much delayed flight to Reno. I mentioned Aristotle’s view of time as the measurement of change; however, Newton believed that time passes even when nothing changes. Einstein resolved the conundrum, represented by these different views, using the concept of a space-time domain forming a gravitational field containing waves. My title is a quote from Carlo Rovelli’s book, ‘The Order of Time‘. And, according to Rovelli, ‘mass slows down time around itself’, which I think will cause waves in the space-time domain . Conservation of energy implies that the movement of an object will tend towards space where time passes more slowly, i.e. in the vicinity of large masses. Hence, things fall downwards because time runs more slowly close to the Earth. This implies that time passes more slowly at the airport than on the plane in flight; but, of course, the differences are too small for us to measure or perceive.
Our senses are bombarded in modern life. When our ears are plugged with sound from the mobile phone to which our eyes are glues, our brain tends to be overloaded with stimuli and we barely register the signals from our other senses: smell, taste, touch. Our smart phones can deliver so much data to our brains that there is little time to savour experiences. Yet, some neuroscientists have suggested that the significant function of consciousness is to provide us with sensory pleasure and a reason to live. In our busy lives, we need to pay attention to the small things in life, such as the taste of your home-made granola at breakfast and the smell of freshly brewed coffee, or the feel of a shell or pebble that you keep on your desk [‘Pebbles – where are yours?’ on September 27, 2017]. So, tune into all of your senses and give your mind a break from the digital world. It should make you feel better.