Spacecraft use a more primitive design called an alkaline fuel cell (AFC), while much greater amounts of power could be generated by an alternative design known as a solid-oxide fuel cell (SOFC). Microbial fuel cells have an extra feature: they use a tank of bacteria to digest sugar, ...
When creating such images, you have to decide how much detail you want to create in the model. In the finally mage, even the largest printer in the foreground is only going to be a couple of inches square on the final Christmas card so you don’t really need to put in a lot of de...