![[IMG_7217.jpeg]] Interesting ![[IMG_7240.png]] Dopamine etc kindve intense in many ways biophysical. Need to take a break for it to be sustainable. Story of the Finnish soldier who took the whole bottle of amphetamines while fleeing the Nazis and staying up for a week. Find it interesting the fairly sizeable proportion of the day that we and almost all other large intelligent animals have to sleep to function. 1/3 of the day recovering. Huge economic benefits to any animal that could adapt to not require this yet it didn’t occur… means that either it’s biologically very very beneficial (or potentially almost physically ‘essential’ given the constraints of earth biology)