There’s a poetry to it, a liminal feeling of being between two existences, that of night and day. The prefix “twi-” in Old ...

People with this chronotype follow the rise and fall of the sun. Bears spend most of their day awake and sit pretty much in ...

Sleeping for 7 to 9 hours at night isn't the only way to catch some z's. Here are four alternative sleep cycles -- and ...

Here are the common types of circadian rhythm disorders ... reset the circadian rhythm. While circadian rhythm disorders are ...

Conditions that affect your heart and blood vessels can include problems you're born with, heart valves that don't work they way they should, and irregular heart rhythms. But when most doctors ...

Sleep apnea is a disorder that involves pauses in breathing during sleep. Three main types exist: obstructive, central, and complex. Each is defined and treated based on its underlying cause.

Let's examine the three different types of burnout and how to prevail over each of them. Overload burnout is the result of pushing yourself to work harder and harder to succeed, even if it's at ...

Wonder Land: An election from the bottom of the barrel is almost over. Photo: Images: Jeff M. Brown/Zuma Press/Tasos Katopodis/Getty Images One of the more unusual aspects of this presidential ...

Companies are debating whether to look to teleworking or a mass return to the office, while a number of studies have focused ...

We spoke with sleep experts about the afternoon slump, including causes, what you can do to manage it and when it might be a clue that something more serious is going on.

This used to be sand and other sediment - that's why it is called sandstone - which is a type of sedimentary rock. Sedimentary rocks are formed when pieces of rock are eroded, or worn away ...