A group of researchers in Chicago and Australia are using observations of internet use to chart the world’s sleeping habits, reports the Daily Mail. 

The team conducted the study assuming that the switch from a device being online to offline corresponds corresponds with a person going to sleep, and switching on a device corresponds to someone waking up.

The researchers then analyzed this data for more than 600 cities around the world.

The research paper, written by a team of three researchers, is still awaiting publication.

Dr Simon Angus, a lecturer in the Department of Economics at Monash University and a co-author of the study, told the DailyMail.com: “Our work starts with the idea that having over half of the world’s population connected to a single technology represents a milestone for humanity.”

Read more at www.dailymail.co.uk