Can a $110 million helmet Unlock the secrets of the mind?

The next step in neuroscience is taking the brain online. The promise of affordable technology that anyone can wear and walk around with, enabling researchers to gain insight into a myriad of conditions, including brain ageing, concussions and strokes, looks like it's about to become a reality. Ashlee Vance discovers the mind-bending technology developed by Kernal, a startup trying to build and sell inexpensive helmets with the precision required to gain insights into the human brain and explores the implications for the future.