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Adult stem cells originate in a different part of the brain than is commonly believed, and with proper stimulation they can produce new brain cells to replace those lost to disease or injury, a new study has shown.

Along with all the other changes that come with age, healthy older people also lose some capacity for sleep. When asked to stay in bed for 16 hours in the dark each day for several days, younger people get an average of 9 hours of shuteye compared to 7.5 for older people, the researchers report.

Parents who have regular meals with their adolescent children might help lessen the chances they will start drinking or smoking later in their teen years, according to new research. Researchers noted benefits in families that ate five or more meals together each week, and found that about 60 percent of the participants did so.

Two new research studies have discovered a long sought molecular link between our metabolism and components of the internal clock that drives circadian rhythms, keeping us to a roughly 24-hour schedule.

Rigid parenting appears to be linked to increased sexual activity in older teens. More than two of every three American teens has sexual intercourse before age 19. Although it is difficult to confirm that controlling mothers and fathers cause kids to have more sex, the findings suggest it is wise to give children freedom.

Researchers have found a molecular link between circadian rhythms -- our own body clock -- and metabolism. The discovery reveals new possibilities for the treatment of diabetes, obesity and other related diseases.

Sports-related concussions in young athletes frequently go unrecognized, and often do not receive proper respect for the potential seriousness that even a mild injury may have, according to a pediatric sports medicine specialist. With more high-profile athletes describing their postconcussive symptoms, awareness is at an all-time high. An explosion in research about concussions in the past five years has increased understanding of how serious concussions may be.

People are powerfully but subconsciously influenced by the weight of those around them. Without being aware of it, researchers believe, human beings keep up with the weight of the Joneses. For a whole society, this can lead to a spiral of imitative obesity.

Although state lotteries, on average, return just 53 cents for every dollar spent on a ticket, people continue to pour money into them -- especially low-income people, who spend a greater percentage of their incomes on lottery tickets than the wealthier segments of society. A new study points to income as an influential factor in the decision to invest in a product that provides poor returns.

Associated Press July 24, 2008 WASHINGTON - Sixteen years after Barbie dolls declared, "Math class is tough!" girls are proving that when it comes to math they are just as tough as boys. In the largest study of its kind, girls measured up to boys in every grade, from second through 11th. The research was...

McClatchy-Tribune Information Services -- Unrestricted July 24, 2008 A June U.S. Supreme Court decision limiting the right of mentally ill defendants to represent themselves in court could affect the case of Joseph Duncan, who admitted killing four members of a North Idaho family.

McClatchy-Tribune Information Services -- Unrestricted July 24, 2008 War veterans, especially those living in rural areas, need more accessible mental health services after a statewide study showed many are suffering from post-traumatic stress disorder and depression, a West Virginia University psychology professor told a U.S. Senate committee.

Again and again, experiments confirmed it. Without glia, neurons die. So scientists who wanted to study in living animals what glia -- the most abundant brain cells -- do for neurons besides keep them alive were out of luck. But now, a breakthrough.

Masha, a middle-aged avatar from Second Life, is an integral part of a new research project to teach and give students practice time to communicate with mock patients. Not only do findings from the study have potential to revolutionize dental education but also to change the way national testing is done for patient-side communication skills.

Picking up on innuendo and social cues is a central component of engaging in conversation, but people with autism often struggle to determine another person's intentions in a social interaction. New research sheds light on the neural mechanisms that are responsible for such social difficulties in autism, and on the workings of these social brain mechanisms in all of us.

Since the idea of using DNA to create faster, smaller, and more powerful computers originated in 1994, scientists have been scrambling to develop successful ways to use genetic code for computation. Now, new research suggests that if we want to carry out artificial computations, all we have to do is literally look around. A researcher has begun to develop a technique to turn our eyes and visual system into a programmable computer.

CD4+ T lymphocytes, or simply CD4 T cells, are the "brains" of the immune system, coordinating its activity when the body comes under attack. They are also the cells that are attacked by HIV, the devastating virus that causes AIDS and has infected roughly 40 million people worldwide. The virus slowly eats away at CD4 T cells, weakening the immune system.

We've all heard it. Many of us in fact believe it. Girls just aren't as good at math as boys. But is it true? After sifting through mountains of data - including SAT results and math scores from 7 million students who were tested in accordance with the No Child Left Behind Act - a team of scientists says the answer is no.

In a new twist on the Confucian ideal of filial piety, a study finds that the assistance of daughters-in-law -- but not their own children -- helps mitigate depression among older people in China. Almost two-thirds of the older population in China lives in rural areas, making it the largest concentration of older adults in the world.

Over the last decade, energy drinks -- such as Red Bull, Monster and Rockstar -- have become nearly ubiquitous on college campuses. Now new research validates and expands upon existing concerns about energy drink consumption.