Matt walker is one of the most prominent sleep researchers in the field. He started out in a lab for phd, where he was trying to differentiate between different types of dimentia. But then he realized that you could measure their brain waves while they were sleeping. And if you measured their sleeping brain waves,. Youcould that they were suffering from different types of dimensian igesther's, like parkinson's dimentia and other things. So this notlike a journalist parachooting in interloper. This is like an actual scientist who has published dozens of articles in very prostigious scholarly journals.