The Human Brain

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

Sleepwalking is an intriguing phenomenon. How can a person be unconscious but still coordinate his or her limbs? And how do we know when we're really awake?

By Katie Lambert

Nostalgia, contrary to centuries of common knowledge, appears to be a good thing. A really good thing.

By Julia Layton

You've probably experienced that moment where you're driving, get lost, turn down the radio, and then think, "Why did I just do that?"

By Maria Trimarchi

Pain is subjective — what is excruciating to you might be tolerable to me. Which is why it's so difficult to measure and control.

By Jennifer Sellers

Odd as it may seem, many antidepressants like Zoloft having warning labels about increases in suicidal thoughts. Why would that be? And how will you know if your medication is actually working?

By Laurie L. Dove

Have you ever met someone with a unique first name, and then all of a sudden you hear the name everywhere you turn? That's the Baader-Meinhof phenomenon at work. How did it get that handle?

By Kate Kershner & Austin Henderson

Are you a person who likes to be social but also values some alone time? You are? How did we guess without knowing you? Welcome to the Barnum effect.

By Kate Kershner

Why does the experience of sleep paralysis often summon explanations of demonic visitations? Visit the place where dreams and reality overlap, and where science and myth attempt to interpret our hallucinations.

By Robert Lamb

You're deep in dreamland when you hear an explosion so loud you wake up. But there's nothing outside or inside your house making the noise. What just happened?

By Sean Russell

When you see someone yawning, even in a picture, chances are a yawning urge will come over you, too. But is this also true of sneezing, and if so, why?

By Laurie L. Dove

Ever tried to get your child, spouse or friend to do something by telling them to do the opposite? That's reverse psychology. But how often does it work?

By Melanie Radzicki McManus

If you've ever dashed into the grocery store to pick up a tube of toothpaste, you've likely been stopped in your tracks by the sheer number of options available. So why does having more options make it so much harder to make the right choice?

By Tom Scheve

Once scientists discovered that some members of the great ape family could recognize their reflections in mirrors, academics began to wonder whether these animals were actually conscious of themselves. That debate continues today.

By Jessika Toothman & Sascha Bos

We'd like to think we're pretty clever, but when you correct for body mass, dolphin brains aren't far off from our own. What cognitive skills do dolphins possess, and could they really be our intellectual equals?

By Jessika Toothman

Computers can handle far more calculations per second than the human brain, and can store and retrieve information very reliably. Should we be jealous of these hunks of silicon and metal on our desks?

By Jonathan Strickland

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

Politicians and celebrities often lie or exaggerate claims that can be easily verified, but why?

By Alia Hoyt

We see faces in clouds, on buildings — heck, in grilled cheese sandwiches. But why is that? And how is this a help to our survival?

By Dave Roos

Erosion and weather can combine to make rock formations look like all kinds of things, from human faces to animals. They're called mimetoliths and we've taken a look at four of the most famous.

By Michelle Konstantinovsky

Your dreams have meaning, but dream interpretation is tough. So what does it mean when you dream about someone all the time? We talked to dream analysts who help explain.

By Dominique Michelle Astorino

We all know what it feels like to be burned out. But does that really mean that our brain is tired? And is it the same as when other muscles tire out?

By Carrie Whitney, Ph.D.

Most people throughout the world are right-handed. So can they teach themselves to use their left hands, too and become ambidextrous?

By Patty Rasmussen