The circadian rhythm that quietly pulses inside us all, guiding our daily cycle from sleep to wakefulness and back to sleep again, may be doing much more than just that simple metronomic task, ...

The circadian rhythm that quietly pulses inside us all, guiding our daily cycle from sleep to wakefulness and back to sleep again, may be doing much more than just that simple metronomic task, ...

Two of my three children walk in their sleep. Ruby goes to sleep and wakes up in the morning without a single incident. She doesn’t talk or walk, and rarely moves. She sleeps so well, in fact, that ...