Zombies aren’t the only ones jonesin’ for gray matter. Scientists are trying to create a machine that mimics the cranial CPU — in the hopes of shedding light on organic brain function and allowing research that doesn’t depend on organ donors. Researchers in Australia have made a key advance, saving information the way your brain does. Using such tech, scientists might someday build a human-like brain, making artificial intelligence a genuine possibility. But don’t get too excited — first they need to advance beyond simulating 1 percent of the brain’s staggering computing power.