ScienceIQ.com

The Physics of Sandcastles

Give a plastic bucket and a shovel to a child, then turn her loose on a beach full of sand. She'll happily toil the day away building the sandcastle to end all sandcastles. It's pure fun. It's also serious physics. Sandcastles are built from grains - billions of tiny sharp-edged particles that rub and tumble together. The strength of a sandcastle ...

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Sandcastles
Engineering

Leaning Wonder of Engineering

Most everyone is familiar with the famous Leaning Tower of Pisa. It's known not so much for its engineering, as for the fact that it hasn't fallen yet. From an engineering standpoint, it is a study in ... Continue reading

TowerofPisa
Physics

Does Your Brain Do Flips?

You may not be aware of it, but when you look at the world, the image projected on your retina is upside down. This is due to the optics used by our eyes. Our brain compensates for this upside down ... Continue reading

BrainFlips
Biology

Will That Be One Hump or Two?

Camels are highly adaptive to their environments. Often called the ships of the desert, they have been domesticated by humans for thousands of years, as beasts of burden and as transportation. What ... Continue reading

Humps
Medicine

Malaria and Sickle Cell Anemia

Sickle cell anemia is a genetic disorder in which the red blood cells collapse into a 'sickle' shape and cannot carry oxygen very well. They also tend to get stuck in narrow blood vessels, causing ... Continue reading

MalariaSickleCell

A Little OCD In Me And Thee?

ALittleOCDInMeAndTheeObsessive-Compulsive Disorder (OCD) may not get as much attention as learning disorders such as dyslexia and ADHD, but its rate of occurrence (about 2 to 3 percent) makes it more common than asthma or diabetes. What exactly is OCD, and how do you know if you have it? By definition, the obsessions of OCD are persistent thoughts or images that are felt to be unwanted and intrusive. In other words, most of the things we ordinarily call obsessions would not qualify someone for an OCD diagnosis. People who are, in the normal sense, obsessed with an object of romantic desire -- who are 'in love' or 'infatuated' -- do not have OCD. If they were chronically tormented by inappropriate sexual fantasies, that might be an obsession in the OCD sense.

On the other hand, if you look at the symptoms of OCD, you can view them as extreme forms of ordinary personality traits that people have to varying degrees. Under most circumstances, those traits will not interfere with a person's life the way that OCD traits do. But they can be viewed as risk factors for developing full-blown OCD, and they also seem to be relatively common among close family members of people with OCD. For example, we all differ in the degree to which we display something called thought-action fusion (TAF) -- a breakdown in the distinction between performing an action and just thinking about it. Can you jinx someone just by thinking of something good (or bad) happening to them? Probably everybody has superstitious beliefs like these, or takes responsibility for thoughts that may randomly pass through their head as if they had actually acted them out.

Many cultures have a belief in the magical power of words, and many taboos arise out of those beliefs. It's also fairly common to believe that just talking or thinking about something will make it more or less likely for it to happen (knock wood!), even if you rationally know the belief to be false. People with OCD score high on TAF scales. People who don't have OCD and score high on TAF scales are also more likely than average to develop OCD later on. Of course, that doesn't mean that superstitions are an early sign of OCD. People who rate high in TAF are often just people who make life a little harder for themselves by taking on a feeling of responsibility for things they can't influence, or by taking on feelings of guilt for things they didn't actually do. Those are, in mild form, very similar to what a person with OCD feels.