This is really cool. They've made an entirely electronic hippocampus. From what I understand, they took a normal hippocampus out of a rat's brain, hooked up electrodes to its input and output, and sent a huge variety of signals through it until they had a decent model for its operation. Then they implemented the function in a chip. `Ta-da!', just like the real thing. Now they are putting the chip in the rat to see what happens.

I want to get one of these in my head, but I would like the chip to just communicate to a computer which will perform the function in software. Then I can sit and my computer and tweak it, no doubt getting crazy drug-like effects. Of course, if I screwed it up, I might not be able to fix it.