There's something called the Beckenstein bound[0] which is the higher bound on information density in a volume of space. That's probably the limit on complexity

There's something called the Beckenstein bound[0] which is the higher bound on information density in a volume of space. That's probably the limit on complexity in life. That said, we're several orders of magnitude away from that, and even we have a theoretical way of FTL travel[1]. [0] https://en.wikipedia.org/wiki/Bekenstein_bound https://en.wikipedia.org/wiki/Bekenstein_bound [1] https://en.wikipedia.org/wiki/Alcubierre_drive https://en.wikipedia.org/wiki/Alcubierre_drive