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The ‘first-night effect’: why it’s hard to sleep when you’re somewhere new

Research suggests there may be evolutionary reasons we don’t fully switch off when we’re sleeping in an unfamiliar environment.

Charlotte Gupta

One night of Halloween treats won’t harm your kids’ health long term. But the sugar and excitement can disrupt their sleep – and yours.

There’s not a lot of research on whether cutting down on caffeine makes our dreams more vivid. But that doesn’t mean we’re completely in the dark.

Studies have shown people who sleep more than average have a higher risk of health problems and death. But is sleeping a lot a symptom or a cause?

A new study suggests eating dairy products before bed could be linked to nightmares. Here’s why cheese could be a culprit.