Without enough sleep, doctors say the body doesn’t have enough time to do what it needs to do to maintain the immune system.

I'm not sure which part of this is best: the way Poppy understands it's time for bed and retreats accordingly, the fact that ...

The importance of sleep can’t be overstated, with a good night’s shut-eye essential for mental and physical health. We sleep for around a third of our lives and it is as key to our survival as water ...