@netflix’s CEO was asked last year who his biggest competitor was.
To the interviewer’s surprise, he said “sleep”
![](https://pbs.twimg.com/media/DqQw5j_X4AAv5kj.jpg)
It’s all to do with light. Light is the main cue that helps keep your body clock in sync with the world.
When you travel, your body clock resets over a few days with the new pattern of light/dark exposure.
![](https://pbs.twimg.com/media/DqQw6pBW4AAr0OQ.jpg)
nhs.uk/live-well/slee…