The Biggest Artificial Brain Ever

"Scientists at IBM's Almaden research center have built the biggest artificial brain ever—a cell-by-cell simulation of the human visual cortex: 1.6 billion virtual neurons connected by 9 trillion synapses. This computer simulation, as large as a cat's brain, blows away the previous record—a simulated rat's brain with 55 million neurons—built by the same team two years ago.

"This is a Hubble Telescope of the mind, a linear accelerator of the brain," says Dharmendra Modha, the Almaden computer scientist who will announce the feat at the Supercomputing 2009 conference in Portland, Ore. In other words, in the realm of computer science, the team's undertaking is grand.

The visual cortex, the wrinkly outer layer of the brain, performs most of the higher functions that make humans human, from recognizing faces and speech to choreographing the dozens of muscle contractions involved in a perfect tennis serve. It does this using a universal neural circuit called a microcolumn, repeated over and over. Modha hopes the simulation, assembled using neuroscience data from rats, cats, monkeys and humans, will help scientists better understand how the brain works—and, in particular, how the cortical microcolumn manages to perform such a wide range of tasks.

But deciphering the microcolumn can also help build better computers, Mars rovers and robots that are truly intelligent. By reverse engineering this cortical structure, Modha says, researchers could give machines the ability to interpret biological senses such as sight, hearing and touch. And artificial machine brains could process, intelligently, senses that don't currently exist in the natural world, such as radar and laser range-finding. "Imagine peppering the entire surface of the ocean with pressure, temperature, humidity, wave height and turbidity sensors," Modha says. "Imagine streaming this data to a reverse-engineered cortex." In short, he envisions wiring the entire planet—transforming it into a virtual organism with the capacity to understand its own evolving patterns of weather, climate and ocean currents.

IBM has revealed the biggest artificial brain of all time, a simulation run by a 147,456-processor supercomputer that requires millions of watts of electricity and over 150,000 gigabytes of memory. The brain simulation is a feat for neuroscience and computer processing—but it's still one-eighty-third the speed of a human brain and is only as large as a cat's. Will we ever get to truly capable artificial intelligence?"

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What are you thoughts on the future of AI?