A wooden toe from Egypt has been examined by scientists in Switzerland. Photograph: Matja Kacicnik/University of Basel

Scientists in Switzerland have re-examined a 3,000-year-old wooden prosthetic toe, likely to be “one of the oldest prosthetic devices in human history(...)

The impact of sleep deprivation on human health is ‘scarcely investigated’

“I believe that light is medicine,” says clinical psychologist Dr Michael Breus, a Fellow of The American Academy of Sleep Medicine. “Light affects o(...)

The long-term effects of alcohol on sleep are rather devastating, such that deep sleep almost disappears in alcohol-addicted people. Photograph: iStock

The experts seem to agree: what defines the connection between nutrition and sleep is a lack of sufficiently thorough, long-term research on how one i(...)

Owing to a lack of sunshine during winter, while people may be sleeping for longer hours, the quality of their sleep tends to be inferior. Photograph: iStock

“In sleep surveys in our latitudes in Europe, 50 per cent of the respondents indicate they sleep 30-60 minutes longer in winter than in summer,” says (...)