Michio Kaku

The most complex object in the known universe: Brain, only uses 20 watts of power. It would require a nuclear power plant to energize a computer the size of a city block to mimic your brain, and your brain does it with just 20 watts.

https://twitter.com/ValaAfshar/status/1640904634230341632
https://x.com/ValaAfshar/status/2061566793987076574