Since we don’t want to limit our thinking about the future of life to the species we’ve encountered so far, let’s instead define life very broadly, s… - Max Tegmark

let’s instead define life very broadly, simply as a process that can retain its complexity and replicate.

The question of how to define life is notoriously controversial. Competing definitions abound, some of which include highly specific requirements such as being composed of cells, which might disqualify both future intelligent machines and extraterrestrial civilizations. Since we don’t want to limit our thinking about the future of life to the species we’ve encountered so far, let’s instead define life very broadly, simply as a process that can retain its complexity and replicate.

There's no better guarantee of failure than convincing yourself that success is impossible...

Advancing computer performance is like water slowly flooding the landscape. A half century ago it began to drown the lowlands, driving out human calculators and record clerks, but leaving most of us dry. Now the flood has reached the foothills, and our outposts there are contemplating retreat. We feel safe on our peaks, but, at the present rate, those too will be submerged within another half century. I propose that we build Arks as that day nears, and adopt a seafaring life!

If our 14 billion year cosmic history were scaled to 1 year, then 100,000 years of human history would be 4 minutes, and a 100 year life would be 0.2 seconds.