Bryan Johnson isn't short of ambition. The founder and CEO of neuroscience company Kernel wants "to expand the bounds of human intelligence". He is planning to do this with neuroprosthetics; brain augmentations that can improve mental function and treat disorders. Put simply, Kernel hopes to place a chip in your brain.

It isn't clear yet exactly how this will work. There's a lot of excited talk about the possibilities of the technology, but – publicly, at least – Kernel's output at the moment is an idea. A big idea. 

"My hope is that within 15 years we can build sufficiently powerful tools to interface with our brains," Johnson says. "Can I increase my rate of learning, scope of imagination, and ability to love? Can I understand what it's like to live in a 10-dimensional reality? Can we ameliorate or cure neurological disease and dysfunction?"