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Back in 2004, Google's founders told Playboy magazine that one day we'd have direct access to the Internet through brain implants, with "the entirety of the world's information as just one of our thoughts." A decade later, the road map is taking shape. While it may be years before implants like BrainGate are safe enough to be commonplace—they require brain surgery, after all—there are a host of brainwave sensors in development for use outside of the skull that will be transformational for all of us: caps for measuring driver alertness, headbands for monitoring sleep, helmets for controlling video games. This could lead to wearable EEGs, implantable nanochips or even technology that can listen to our brain signals using the electromagnetic waves that pervade the air we breathe. Just as human intelligence is expanding in the direction of the Internet, the Internet itself promises to get smarter and smarter. In fact, it could prove to be the basis of the machine intelligence that scientists have been racing toward since the 1950s.

Neurons may be good analogs for transistors and maybe even computer chips, but they're not good building blocks of intelligence. The neural network is fundamental. The BrainGate technology works because the chip attaches not to a single neuron, but to a network of neurons. Reading the signals of a single neuron would tell us very little; it certainly wouldn't allow BrainGate patients to move a robotic arm or a computer cursor. Scientists may never be able to reverse engineer the neuron, but they are increasingly able to interpret the communication of the network. It is for this reason that the Internet is a better candidate for intelligence than are computers. Computers are perfect calculators composed of perfect transistors; they are like neurons as we once envisioned them. But the Internet has all the quirkiness of the brain: it can work in parallel, it can communicate across broad distances, and it makes mistakes. Even though the Internet is at an early stage in its evolution, it can leverage the brain that nature has given us. The convergence of computer networks and neural networks is the key to creating real intelligence from artificial machines. It took millions of years for humans to gain intelligence, but with the human mind as a guide, it may only take a century to create Internet intelligence.

In its announcement, DARPA acknowledged that an implant is still a long ways away, with breakthroughs in neuroscience, synthetic biology, low-power electronics, photonics and medical-device manufacturing needed before the device could be used.DARPA plans to recruit a diverse set of experts in an attempt to accelerate the project's development, according to its statement announcing the project.