A nod and 40 winks

The brain may be better suited to a split cycle of sleep, reports Richard Fitzpatrick.

WHO doesn’t have trouble falling asleep at times? It must be one of the most confounding experiences in life. You’re in bed. You’re tired. You want to sleep. You can’t sleep.

According to The Irish Sleep Apnoea Trust, insomnia affects between six and 15% of the Irish population, while every night, says David K Randall, author of Dreamland: Adventures in the Strange Science of Sleep, one in three adults around the world have trouble falling asleep.