Cardiff Uni: Sleep engineering can help brain health

We spend a third of our lives sleeping. So, imagine if we could use that time to improve our memories, study, better our brain health or even tackle post-traumatic stress disorder.

Welcome to the world of sleep engineering, where tailoring your shut-eye could be a route to a better you.

Cardiff University Prof Penny Lewis explains how playing ticking sounds into a sleepers' ear can improve their slow-wave sleep which affects memory, brain health and even susceptibility to dementia.