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How Much Sleep Do You Really Need?

How Much Sleep Do You Really Need?
We spend about 24 years of our lives sleeping, yet the exact function of sleep is still being debated by scientists. In experiments, researchers monitored three groups of participants who slept 4, 6, or 8 hours a night over an extended amount of time. After just two weeks, the group who slept 6 hours had a similar reaction time as a person whose blood alcohol concentration was 0.1 percent. Those who slept 4 hours would fall asleep during their cognitive tests. Here's the video from AsapSCIENCE. People who consistently sleep less than 7 to 8 hours a night may suffer cognitive issues. There also appears to be a genetic mutation that allows a person to sleep less because of their more intense sleep sessions. [Via AsapSCIENCE]

Caveman instincts may explain our belief in gods and ghosts By Steve Kelly, Strathclyde University Notions of gods arise in all human societies, from all powerful and all-knowing deities to simple forest spirits. A recent method of examining religious thought and behaviour links their ubiquity and the similarity of our beliefs to the ways in which human mental processes were adapted for survival in prehistoric times. It rests on a couple of observations about human psychology. The survivors who had this tendency to more readily ascribe agency to an event passed their genes down the generations, increasingly hard-wiring this way of making snap decisions into the brain. Empathic tendencies The second trait is about how we view others. This is known as “theory of mind”. You may be wondering what these two hard-wired processes have to do with belief in gods. Another example might be a volcanic eruption. Of ghosts and gods This even applies to the Abrahamic, all-knowing, all powerful god. Sumus rosaceae!

12 Ways to Get Rid of Gas & Bloating Let’s be straightforward. This is a page about gas, so, that’s what it’s going to sound like it’s about. No dancing around the subject matter, no putting things tentatively, no shame, no giggling…ok a little giggling is fine. Call it whatever, gas, toots, breaking wind, farting, flatulence, air attack, the nether belch-we’re all referring to the same uncomfortable situation that crops up at the worst time-during a test in a silent room, or in a crowded elevator. Save 1. Peppermint is great for soothing churning stomachs and easing gas pains. You will need… -1 bag of herbal peppermint tea -1 cup or so of freshly boiled water Directions Steeping tea seems like something that’s simple enough, but there’s a proper way to go about it. 2. My first day in 9th grade I was terribly bloated for some reason. 3. Whether you’re nauseas, struggling with the stomach flu, or suffering from indigestion, chances are you’ve been given ginger in some form to help calm your upset tummy. 4. 5. 6. 7. 8. 9.

Marijuana Abuse Blunts the Brain’s Response to Dopamine Abusing marijuana blunts the brain’s ability to respond to dopamine, the neurotransmitter that’s responsible for our feelings of pleasure, motivation, and reward. The effects of that "high" might actually lead to depression and anxiety, according to a new study published in Proceedings of the National Academy of Sciences this week. Despite its prevalence, we know surprisingly little about the effects of marijuana abuse on the brain. Many abused substances stimulate brain dopamine signaling -- the mechanism underlying the rewarding effects of drugs, food, and sex. But while studies have shown that cocaine and alcohol, for example, increase dopamine release in the brain’s reward region, this relationship hasn’t been demonstrated consistently for marijuana. So, to investigate marijuana’s impact on the human brain, a team led by Nora Volkow from the U.S. Same amount of dopamine but weaker (or lack of) physical responses suggests the reward circuitry in their brains are damaged.

How Movies Manipulate Your Brain to Keep You Entertained | Science Colored spots indicate where subjects looked during an action sequence from Iron Man 2. Marvel Studios (Iron Man 2) / Tobii Technology (eye tracking data) HOLLYWOOD, California—There’s a crazy action sequence near the beginning of Iron Man 2 in which Tony Stark first meets Ivan Vanko, a rogue Russian scientist wearing a robotic suit and wielding electrified whips. It takes place at the Monaco Grand Prix, where Stark is competing, and Vanko slices up Formula 1 cars like so much toast and puts the hurt on Stark, even after he dons his Iron Man suit. For viewers, it’s quintessential, over-the-top Hollywood action. In the Iron Man 2 sequence, for example, people are remarkably consistent in where they direct their gaze. Jon Favreau, who directed Iron Man 2, was onstage with Smith as he presented the clip, and seemed fascinated by it. Jon Favreau speaks at a recent event hosted by the Academy of Motion Picture Arts and Sciences. Matt Petit / ©A.M.P.A.S

ALERT: Restore My Vision, Today and Keep Your Money in Your Wallet | SAN DIEGO CONSUMERS' ACTION NETWORK “Restore My Vision, Today?” That’s the name of a slick e-mail based advertisement floating around the Net supposedly authored by Dr. Samantha Pearson based upon a “controversial” regimen developed by a Dr. Sen. The emails send you to an even slicker web site asking for the “low price” of $37 for a booklet about eye exercises “guaranteed” to improve your eyesight. 1. 2. 3. 4. 5. In fact, a New York-based optometrist has posted some very useful and time-proven exercises for close-up vision improvement which include: LETTER READING—for better scanning accuracy and conscious eye control when reading or using a computer. NEAR AND FAR—for improved focus and focusing speed when switching your gaze from close objects to distant objects (such as when checking gauges on a car as you drive). PENCIL PUSHUPS—to promote eye teamwork. THE “HOT DOG”—for improved flexibility of the muscles within the eye that allow the lens to change shape.

Tesla: Master of Lightning "In almost every step of progress in electrical engineering, as well as radio, we can trace the spark of thought back to Nikola Tesla" - Ernst F. W. Alexanderson Tesla with one of his famous "wireless" lamps. Few inventors contributed more to advances in science and engineering in the early 20th century than Nikola Tesla. As fate would have it, Tesla, one of the world's greatest inventors, died penniless and in obscurity. Today, there's quite a bit of resurgence in Tesla's popularity, which is helped in part by his mystique as a "mad scientist." Tesla Company letterhead. In their book, Tesla: Master of Lightning , authors Margaret Cheney and Robert Uth tell the story of the enigmatic genius from his birth in a little village in what is Croatia today, to his lonely death in a New York hotel room. On a personal note, it has taken me far longer than I expected to write this excerpt for Neatorama Spotlight. to anyone interested in learning more about the legendary Nikola Tesla.

Just One Question Can Identify a Narcissist Are you a narcissist? Turns out, one question could reveal the tendency to think the world revolves around you. People who have an inflated sense of self will readily admit they are narcissists if they're asked just one straightforward question, a new study suggests. "Narcissists aren't afraid to tell you they're narcissists," said study co-author Brad Bushman, a communications and psychology professor at The Ohio State University. Nation of egotists People with a classic narcissistic personality tend to have an overinflated sense of self, an exhibitionist streak, a sense of entitlement and little empathy for others. "The self-esteem movement, I think, is a big part of that," Bushman said. Being egotistical can have its uses, at least in the short term. But in general, narcissists aren't doing anybody any favors with their overinflated sense of self, Bushman said. No shame Participants had the option of rating their agreement on a scale of 1 (not very true of me) to 7 (very true of me).

Want to Be Happier? It's as Easy as 2, 5, 11, 15, 20, 43 mimagephotography/Shutterstock Is it getting harder to fit all your health goals, work tasks, and personal pleasures into one day? When life feels overwhelming, just rely on your lucky numbers! No, I’m not inviting you to play in a “numbers racket.” The following numbers are “lucky” because they help you accomplish a worthwhile goal in minutes. Lucky Number: 2 David Allen, author of Getting Things Done, suggests that if a task you need to complete will take two minutes or less, just do it now! Lucky Number: 5 When you're frustrated with a difficult project at work or home, use the “Five-Minute Rule.” Lucky Number: 11 If you dislike exercise but still want to live longer, what is the least amount of brisk walking or moderate exercise you can do each day and still get a longevity benefit? Lucky Number: 15 Are you tempted to pick up a third drink despite a vow of moderation? Lucky Number: 20 You are trying hard to solve a problem, but the answer eludes you. Lucky Number: 43 © Meg Selig Sources: