The Human Brain

What are dreams really made of? Are humans the smartest animal? What causes schizophrenia? Travel inside the mind and find out how the human brain works.

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Even if you're very ticklish, you probably are incapable of tickling yourself. Learn why.

One in three people consistently struggle through the autumn and winter months with a type of depression known as seasonal affective disorder (SAD). Here are some tips for dealing with it.

By Harriet Bowyer

Ever find yourself momentarily disoriented in a familiar place or encounter a friend who looks like a stranger? You could be experiencing jamais vu.

By Jennifer Walker-Journey

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Research shows no two brains are put together quite the same way. And we can find out the patterns in under two minutes.

By Jesslyn Shields

The term IQ typically refers to a score on a test that measures someone's cognitive ability. What does this test constitute exactly? And does it accurately measure intelligence?

By Alia Hoyt

Your co-worker just yawned in a meeting, and now everyone on his side of the table is yawning, too. Learn about what might've caused him to do it in the first place and why you're likely to yawn right along with them.

By Melanie Radzicki McManus

Alcoholism can be difficult to spot. Learn the difference between heavy drinking and alcoholism, how alcohol affects the body, what factors may lead to alcoholism and what treatments are available for this addiction.

By Stephanie Watson

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Dreams combine verbal, visual and emotional stimuli into mystifying storylines. Should we bother to interpret them? Are they random brain impulses, or do they offer insight into our waking lives?

By Lee Ann Obringer & Yves Jeffcoat

Whether brain death is a result of cardiac arrest and lack of oxygen to the brain, or of a gunshot wound to the head, the diagnosis is the same. Learn what the term "brain dead" actually means.

By Leslie C. Olson

Every animal you can think of -- mammals, birds, reptiles, fish, amphibians -- all have brains. But the human brain is unique. It gives us the power to think, plan, speak and imagine.

By Craig Freudenrich, Ph.D. & Robynne Boyd

We've all heard of a "sixth sense" and extra-sensory perception. So how many ways can we actually sense the world around us?

By HowStuffWorks.com Contributors

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Every animal sleeps -- some more than others -- but why they do it is a mystery to scientists. Is sleep more than just beauty rest? Could skimping on it kill you? And how much do you really need?

By Marshall Brain

While most psychologists believe that brainwashing is possible under the right conditions, some see it as improbable or at least as a less severe form of influence than the media portrays it to be. So how does someone get brainwashed?

By Julia Layton & Alia Hoyt

Stress is just around every corner for most of us these days. Reducing it requires you to learn the various types of stress, their different causes and how to deal with them.

By Betty Burrows

Learn the physiological processes that trigger a coma, how an actual coma differs from television depictions and how often people awaken after months or even years of being in a coma.

By Stephanie Watson

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To achieve stability despite quick eye movements, the eyes take before and after shots of an image and compare them. Now, scientists may have finally discovered how.

By Julia Layton

The more you know about your memory, the better you'll understand how you can improve it. Get details on how your memory works and how aging affects your ability to remember.

By Richard C. Mohs

Nothing beats watching a blockbuster on the big screen, but today's home theater systems do an impressive job bringing that experience into your home. In this article, we'll explain how the components of a home theater system re-create the sounds and

By Jonathan Strickland

People with face blindness" can see facial features just fine; if they were looking at a face they could describe to you what it looks like. But they cannot retain a memory of it. In severe cases people don't even recognize their own face when they look in the mirror. Learn what face blindness is all about.

By Julia Layton

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Medical examiners are attributing an increasing number of deaths while in police custody to a syndrome called excited delirium. The problem is, there's no proof this syndrome exists.

By Julia Layton

Human beings have always found ways to ward off the effects of sleep deprivation. The newest wake-up pill has all of the benefits of caffeine and amphetamines with none of the down sides.

By Julia Layton

Scientific studies are showing that lefties are quicker and more adroit in some activities than their right-handed counterparts. How true is this idea?

By Julia Layton

Collective hysteria can spread when a fear exists of exposure to a disease, combined with a contained environment. Learn more about collective hysteria works.

By Jacob Silverman & Austin Henderson

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You've just touched a hot stove -- and probably felt an immediate sharp pain, then a dull ache. How do we sense pain, and why does it eventually go away?

By Craig Freudenrich, Ph.D.

That man dressed in animal skins and running around Jerusalem trying to baptize people isn't alone. Tourists in Jerusalem sometimes suffer from a strange conviction that they are Biblical figures. Are they mentally ill or is there more to it?

By Katie Lambert