Only had four hours sleep? Experts share whether that's a good idea and what you can do if you're struggling after a night where your rest has been cut short.

This video segment adapted from NOVA scienceNOW considers the purpose of sleep and, in particular, the connection it shares with memory. By studying the dreams of rats, researchers are hoping to ...

Sleep regularity specifically was found to be a factor in microvascular function. Promoting not only adequate but also consistent sleep is a potential strategy for protecting cardiovascular health. It ...

Getty Images/iStockphoto In a second study, researchers monitored the sleep of 31 routine snoozers, who could snooze for half an hour one morning but were forced to immediately wake on the other.