The forgotten medieval habit of 'two sleeps'
For millennia, people slept in two shifts – once in the evening, and once in the morning. But why? And how did the habit disappear?
More from BBC News (World)
How colours affect the way you think
Our world is awash with a rainbow of colours, but certain shades can have a surprising impact on our ability to concentrate, our mood and even our taste.
«And if you want a child to concentrate, you might consider painting a classroom in a vivid palette and so bolster their reading scores.»
How our brains cope with speaking more than one language
Speaking a second or even a third language can bring obvious advantages, but occasionally the words, grammar and even accents can get mixed up.
«our languages aren't just static throughout our lives but shifting, actively competing and interfering with each other.»
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