4 ms·All life is dependent on cheap energy. It's the currency of the universe.by aeternum 4y agoAll life is dependent on cheap energy. It's the currency of the universe.bombcar 4y agoThe Warlock series had this as the intergalactic currency - the kwaher or kilowatt/hour.HorizonXP 4y agoRecommended read?aidenn0 4y agoThe one by Stasheff? I didn't remember that detail, but haven't read it in a while.