Facebook to buy startup for controlling computers with your mind

Facebook has agreed to acquire CTRL-Labs, a technology startup that is building software to let people control a digital avatar using only their thoughts. The world’s largest social network is paying between $500 million and $1 billion, according to people familiar with the deal.The closely held four-year-old startup, which has dozens of employees and has raised tens of millions in venture capital, uses a bracelet to measure neuron activity in a subject’s arm to determine movement th