In this week's podcast, I discuss sleep, why we need to sleep, and what would happen if we didn't sleep. Do we actually need to sleep? Scientists have explored the question of why we sleep from many different angles. They have examined, for example, what happens when humans or other animals are deprived of sleep. Studies show that it affects our mood, our immune system, our sex drive and our health. So whilst wthe question of why we sleep has been difficult to answer, it is clear that lack of...














