The Download: AI "mind-reading" and creative uses for small batteries

Plus: the Pentagon has tapped Elon Musk to co-lead a future warfare project. An AI "mind-reading" tool can reconstruct what you're looking at based on a brain scan A new AI tool can guess what you're looking at just by analyzing your brain scans--and recreate that image with remarkable precision. It can go the other way too, and predict a person's brain activity based on what they're looking at. The researchers hope the "mindreading" tool could reveal more about how the brain works. It could also help locked-in people communicate and, incredibly, maybe even allow scientists to recreate the content of dreams. But other scientists warn that a similar approach could reveal people's inner thoughts and mental imagery, potentially without their consent.