And the Times reports on a revealing insight into a day in the life of a Silicon Valley billionaire.
The founder of Twitter, Jack Dorsey, has been describing his daily routine - which includes an ice bath at 05:00, just one meal on weekdays, and no food at the weekend.
In an interview for a fitness podcast, Mr Dorsey also said he sometimes avoided eye contact for ten consecutive days in a bid to improve his mental "wellness".
Twitter users have been posting their reactions - with some saying it sounded like the routine of a "Spartan" - or even a "psychopath".
https://www.bbc.co.uk/news/blogs-the-papers-47888892