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...change how they treat teenagers says The Open University's Honorary Associate in Sleep, Circadian and Memory Neuroscience, Dr Paul Kelley...In societies the world over, teenagers are blamed for staying up late, then struggling to wake up in the morning. While it’s true that plenty of teenagers (like many adults) do have bad bedtime habits, researchers have long since...

...climates such as Kenya, Ethiopia and Japan, where temperatures average 25℃. But while running in the heat may be considered a risk to some people – such as children, the elderly and pregnant women – as long as precautions are taken, running in temperatures as high as 30-35℃ is fine. A number of running events take place in extreme heat (over 35℃), such as...

...climate and the place where someone lives. Surgery remained the last resort, but surgical skills were developed on the battlefield and, by the great doctor Galen, in the gladiatorial arena. Between lifestyle and surgery lay a huge range of medicines made mostly from plant substances. Many drugs were purges, intended to evacuate any humoral excess. Lists of remedies would...