Having said that, we do know sleep is key: Teens need an average of one or two hours more sleep than their 9- and 10-year-old siblings, yet studies show most teens gets a few hours less.
The researchers don't know why less sleep is associated with a greater susceptibility to colds.
Or rather, if you geotag your tweets and photos as carelessly as the average microblogger, they know where you sleep, work, and potentially engage in far more private activities.
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The call, hypothetically letting parents know that they could sleep in that day, went out at 4:30 a.m.
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He could not tell the time, relying on the sun's angle and his own instincts to know when to eat or sleep.
In addition to the cost advantages (travel companies often purchase tickets in bulk and can pass along savings) a tour company may employ area experts that know the best places to sleep and eat.
Contrary to what its name might suggest, Mega might be the weakling of the pair, rocking a mere QVGA display, which as far as modern WinMo sets go, is pretty much the only spec we need to know to put us to sleep.
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"I don't know how you and your family sleep at night, " Tiffany says she told Deborah.
But it's virtually impossible to know how well you'll sleep on a bed by testing it in a showroom.
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If you are doing it because it makes you sleep well at night to know that while the price may go down at least it won't go to zero, again, fine to own.
"You can sleep at night now that you know this is the government's position, " says Doyle.
We know that if you deprive a rat of sleep, the rats begin to eat more.
While charisma is nice, CEOs sleep better at night if they know their financial statements and internal controls are being closely monitored by someone they implicitly trust and respect.
When you go to sleep, you don't know if the airplane noise is part of your dream or part of your reality, but you hear it every five or 10 minutes.
You know, you go all those years without any sleep, and you're finally out there giving health care and all of a sudden you're told, here's a straitjacket we'd like you to wear to work every day and still figure out how to make these people well.
In deference to Arianna, I did what I know best: I turned to technology to help me sleep rather than push for a Luddistic, tech-free lifestyle.
"Everything we already know about fighting off chronic disease, like getting sufficient sleep, staying active throughout life, and having a healthy diet" may stave off premature aging of the immune system, too, Epel said.
You know what they say about giants: better to let them sleep.
You'll know it's perimenopause if you also experience occasional hot flashes, sleep trouble, anxiety, and mood changes, Goldberg said.
But in all cases, they know they are making a critical judgment call , and most lose a lot of sleep over the decision.
"They told him last night that if he would cooperate he can go home and sleep in his own bed, and Mr. Caldwell says, you know, 'I've been talking to you for 11 months, I have nothing, '" Braun said.
"If I know there's an approaching storm, I will stay here, I'll sleep in the restaurant, " he said.
"The more you know your teammates, the less likely you are to take comments made in the midst of sleep deprivation personally, " says Sara Ballantyne, 38, a professional mountain-bike racer who helped lead Team Vail to victory in last year's Eco-Challenge in Morocco.
"I don't know if androids dream of electric sheep, but I've certainly been losing a lot of sleep over Google's Android, " laments programmer David N.
To me, doing this and knowing that people back home can sleep safely at night and they don't have to come do it--or, you know, even, you know, guys that were in Vietnam or World War II, they know what it's like.
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