Nature has proved with the brain that it can create complex computers with very little energy consumed and released, extremely low energy compared to a common computer.
However, I noticed the design is completely different, why hasn't anyone tried to or succeeded to create a similar one?
1) Computers use memory as the main building block. After that, a processor is used to manipulate it.
2) However, biological computers do not use memory as the main building block. This is a by-product. The main building block appears to be a combination of static geometry and design of the computer (DNA) which is combined with the energy generators (mitochondria, components of both DNA and energy transfer).