Steam is a wonderful thing. It’s been used to power locomotives, iron clothes, and cook all sorts of delicious food. Steam takes on a unique role in the operation of pressure cookers. Along with heat and regular old air, it allows for very high-temperature cooking in a controlled environment.
The BARF, or “bones and raw food” diet, has picked up a lot of traction in recent years. It sounds pretty disgusting (both due to the acronym and the meaning of the letters), but the participants don’t seem to care. Instead, they live happy, healthy lives while eating ground-up animal parts that you would normally discard.