Inside the Mind

A man in Cornwall, England, went 11 consecutive days without a wink of sleep. Find out how he did it, why he did it and why you shouldn't give it a try.

By Jacob Silverman

Addictions to substances such as drugs and alcohol have ruined the lives of people all over the world. Read about current views and ideas on addiction.

By Josh Clark & Sascha Bos

Antidepressants are the first line of treatment for depression. Sales of antidepressants total $50 billion annually, making this class of drugs one of the leading prescription medications. But are they effective?

By Craig Freudenrich, Ph.D.

Alien hand syndrome sounds like something from a B-grade horror movie, but it's a real condition. You could be completely at the mercy of your own renegade hand -- it could keep your other hand from functioning, punch you or even choke you.

By Charles W. Bryant

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

What exactly is fear? In this article, we'll examine the psychological and physical properties of fear, find out what causes a fear response and look at some ways you can defeat it.

By Julia Layton

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

Ignorance is bliss. But what if you're more than just unaware? If you are dumb as a doornail, flat-out foolish or dim-witted, are you happier than the genius next door?

By Cristen Conger

Laughter may be the best medicine, but can it actually cure an illness? Some doctors are prescribing a daily case of the giggles along with conventional treatments.

By Victoria Vogt

The Declaration of Independence is one of the most significant documents in American history. However, the origin of one of its signature phrases -- the pursuit of happiness -- is shrouded in mystery.

By Josh Clark

Marriage entails waking up beside the one you love and sharing cozy, homemade dinners for two. But when the honeymoon haze clears, are married people happier than singles?

By Cristen Conger

How does a laughter milkshake sound? What about a joy cocktail? Though the former may sound like part of a kid's meal and the latter like a happy hour order, they're both related to laughter yoga.

By Molly Edmonds

If you want to quantify how happy someone is, do you count the number of smiles he or she cracks in a single day? Some researchers are stumped as to how happiness can be measured.

By Cristen Conger

The authors of chain emails often tell you to smile more, with the added claim that it takes more muscles to frown. Ever questioned this piece of wisdom? We have an answer for you.

By Tom Scheve

Smiling isn't complicated: your mouth turns up, your cheeks lift and your eyes crinkle. You're happy and it shows. But can every smile -- even a fake one -- spread that cheerful feeling?

By Julia Layton

We love to play with and fuss over our pets, but have you wondered if they were having as much fun as you were? Can animals actually feel happiness?

By Josh Clark

What are your happiest childhood memories? What do you remember most about them -- the things you bought or the gifts you received, or the events themselves?

By Josh Clark

From giggles to guffaws and chuckles to cackles, humans laugh in a lot of different ways. But what do each of those laughs mean, and are they all related to humor?

By Molly Edmonds & Joseph Miller

From an adult's point of view, kids have it made, spending their days playing and goofing off, with no responsibilities to worry about. But are kids really jumping for joy more often than the rest of us?

By Tom Scheve

Normally, we laugh because something's funny, but sometimes laughter can be something more serious -- a medical symptom. What separates a hearty guffaw from a signal of poor health?

By Victoria Vogt

It doesn't exactly seem like something the human body would do, let a large portion of itself go to complete waste. Is it true that most of your brain is on permanent hiatus?

By Patrick J. Kiger & Austin Henderson

Three weeks of hard work. Is that all it takes to kick your smoking habit, taste for junk food or serial inability to stop hitting the snooze button? Sounds almost too good to be true, doesn't it?

By Julia Layton

The great bullies that have graced the movie and television screen are mostly males, from Bluto to Biff Tannen. We tend to expect boys to throw the punches. But just because girls aren't bloodying noses on the playground doesn't mean they aren't fighting dirty.

By Molly Edmonds