Wednesday, March 31, 2010 ~ Have your say...

World Statistics and Amazing Numbers


With Earth Week quickly approaching, it's important to note the impact the human race has on the planet, and to understand that our massive population affects so many different sectors.
 
Worldometers.info is a fantastic site which updates, in real time, the data below. The information in the images below is copyright Worldometers.info, and is a snapshot of the data as of March 31st.  It will be interesting to revisit these numbers one year from today, and perform a comparison.


Friday, March 19, 2010 ~ Have your say...

5 More Crazy Optical Illusions

Back by popular demand, we have 5 more crazy optical illusions:

The shapes in the two triangles have been moved around. If the partitions below are the same, shouldn't every space be filled?


Is this window on the right or left of this building?

The Penrose triangle appears to be solid on the page, but it cannot be physically built.

"Say" the colour of the words below. Having any trouble?

There are only three colors in this picture: Pink, Green, and White....  Dark Green and Red are illusions...

As mentioned in the original article, our visual perception cannot always be trusted. The components of an object can distort the perception of the complete object. Our mind is the final arbiter of truth. Most optical illusions are the result of:


1)   Incongruent design elements at opposite ends of parallel lines

2)   Influence of background patterns on the overall design

3)   Adjustment of our perception at the boundaries of areas of high contrast

4)  Afterimages resulting from eye movements or from kinetic displays

5)  Inability to interpret the spatial structure of an object from the context provided by the picture.



For a full explanation and collection of other crazy optical illusions, please visit The Scientific Psychic.  

Tuesday, March 16, 2010 ~ Have your say...

The Democratization of Information: Filtering Through the Rubbish

Several years ago, I injured my knee while exercising and then re-injured my knee two years later.  I recently received the results of my MRI, and found out I had a joint effusion, which is basically a small bubble of fluid that has accumulated in the knee as a result of the injuries.  The doctor suggested I begin physio therapy to strengthen the knee (since I now favour the other knee), and that I exercise regularly.  If the issue persists 6 months from now, then I can take the next steps - but I basically got the all-clear for regular exercise, and that there is no major damage like a torn MCL or ACL.

When I got home, I decided to research "treating joint effusion".  The top result came up on eHow.com, with a "moderately easy" 9 steps for treatment.  Some of these steps make sense, but several of them caused me to wave my skeptical flags.  I will present the steps below, along with my comments in blue.

Step 1
Lose 20 lbs. Excess body fat adds extra pressure on all of the body’s joints. So losing weight will reduce fluid and pressure everywhere.

While losing weight certainly is good for the joints, suggesting 20 lbs is rather arbitrary because it depends entirely on the weight of the individual.  If I took this advice, my Body Mass Index (BMI) would drop to an unhealthy level.  Consult your physician before deciding to lose weight, especially if you are on the low end of the scale.

Step 2
Walk on a regular basis. By moving your joints, you will remain flexible. Also, it will thwart any arthritis trying to set in to your joints.

Fair enough, and makes common sense.

Step 3
Take a pill. Aspirin, acetaminophen and ibuprofen help with pain. They will help you manage on days when your joint effusion is flared up.

Again, consult your physician before taking any medication.  Taking aspirin or ibuprofen is dangerous if you are already take blood thinners for another condition.

Step 4
Drink 8 glasses of water daily. Water helps the body flush itself of toxins. As a result, it will function better and be less likely to build up fluid.

"There is no medical evidence to suggest that you need that much water," said Dr. Rachel Vreeman, a pediatrics research fellow at the university and co-author of the journal article. Vreeman thinks this myth can be traced back to a 1945 recommendation from the Nutrition Council that a person consume the equivalent of 8 glasses (64 ounces) of fluid a day. Over the years, "fluid" turned to water. But fruits and vegetables, plus coffee and other liquids, count.   (Source:  http://www.livescience.com/health/071220-medical-myths.html)

Step 5
Lift weights. Make sure you focus on your legs. By building up the muscle in that area, you will strengthen your knees and fight the affects of arthritis and joint effusion.

Make sense - regular exercise is always a good thing.

Step 6
Eat your vitamins. Consume a diet high in leafy greens that contain B6. B6 reduces tissue swelling and will bring you relief from joint effusion.

B6 reduces tissue swelling?  In my research, I found no concrete proof.  On WebMD, I did find a feature article on arthritis and joint pain, and B6 was not listed as one of the recommended supplements.  A well balanced diet will certainly help, but as to whether or not "B6 reduces tissue swelling and will bring you relief" - I remain highly skeptical.   (Source:  http://www.webmd.com/vitamins-lifestyle-guide/alternatives-and-supplements-for-arthritis-joint-pain)

Step 7
Adjust your chair. Proper posture will help reduce pressure on your joints. So make sure the chair you sit in at work is adjusted to the right height and has a strong back.

Ok, makes sense.

Step 8
Visit an acupuncturist. Holistic healing has been proven to help a lot of medical conditions dealing with the joints. Regular treatment will help reduce pain and swelling in your knee.

Hold the phone!  Two huge red flags:  "acupuncture" and "holistic healing has been proven to help a lot of medical conditions dealing with the joints.".  Really?

According to Dr. Steven Novella, from his article discussing Acupunture:

"Once again we see that the best acupuncture clinical trials show that it does not matter where or if you place the needles. Since these are the two interventions specific to acpuncture, we can conclude (confidently, at this point) that acupuncture does not work and that any perceived benefit from acupucture is due to placebo or nonspecific effects."  (Source:  http://www.sciencebasedmedicine.org/?p=492)

According to Dr. Harriet Hall, in her article, Puncturing the Acupuncture Myth:

"Considering the inconsistent research results, the implausibility of qi and meridians, and the many questions that remain, it’s reasonable to conclude that acupuncture is nothing more than a recipe for an elaborate placebo seasoned with a soupçon of counter-irritant."  (Source:  http://www.skeptic.com/eskeptic/08-10-08/

Take a few minutes and read the articles - you will see there has been no conclusive evidence for the efficacy of acupuncture.

Step 9
Get surgery. A doctor can drain the fluid in your knee by making an incision near the large joint of the knee. It will also allow him to do two other things:he can make sure an infection is not contributing to your joint effusion, or he can give you a cortisone shot to prevent future fluid build up.

Wow - I am surprised that surgery falls under the category "moderately easy".  Enough said. 
---------------------------
There is a valuable lesson to be learned - do not immediately trust the first thing you read on the Internet, unless if you know it if from a reliable source.  This may seem obvious to some, but not everyone knows and realizes that "steps" like the ones above, are not necessarily written by professionals.  Do some research, and look for both sides of the argument.  When doing your research, make sure you look for sites where a product is not being sold, or someone is out to promote their product or service.  Their information will almost certainly be biased.

I suggest reading the article "Twenty-Five Ways to Spot Quacks and Vitamin Pushers", by Stephen Barrett, M.D., and Victor Herbert, M.D., J.D..  Also, the article "Be Wary of "Alternative" Health Methods", by Stephen Barrett, M.D. 

The eHow "steps" are a clear example of why we need to be cautious when presented with information.  We need to filter through the rubbish using our skeptical toolkits, and make educated decisions.  Of course, we should also check with our licensed professionals - they are the real experts.

Tuesday, March 9, 2010 ~ Have your say...

Top 10 Common Faults In Human Thought

From the site Listverse.com:

"The human mind is a wonderful thing. Cognition, the act or process of thinking, enables us to process vast amounts of information quickly. For example, every time your eyes are open, you brain is constantly being bombarded with stimuli. You may be consciously thinking about one specific thing, but you brain is processing thousands of subconscious ideas.

Unfortunately, our cognition is not perfect, and there are certain judgment errors that we are prone to making, known in the field of psychology as cognitive biases. They happen to everybody regardless of age, gender, education, intelligence, or other factors. Some of them are well known, others not, but all of them are interesting."

They are:

Gambler's Fallacy: 
The tendency to think that future probabilities are altered by past events, when in reality, they are not.

Reactivity: 
The tendency of people to act or appear differently when they know that they are being observed.

Pareidolia: 
When random images or sounds are perceived as significant.

Self-fufilling prophecy: 
Engaging in behaviors that obtain results that confirm existing attitudes.

Halo Effect:
The tendency for an individual’s positive or negative trait to “spill over” to other areas of their personality in others’ perceptions of them.

Herd Mentality: 
The tendency to adopt the opinions and follow the behaviors of the majority to feel safer and to avoid conflict.

Reactance: 
The urge to do the opposite of what someone wants you to do out of a need to resist a perceived attempt to constrain your freedom of choice.

Hyperbolic discounting: 
The tendency for people to prefer a smaller, immediate payoff over a larger, delayed payoff.

Escalation of commitment:
 
The tendency for people to continue to support previously unsuccessful endeavors.

The Placebo effect: 
When an ineffectual substance that is believed to have healing properties produces the desired effect.

Read more about it here:  Top 10 Common Faults In Human Thought

Monday, March 8, 2010 ~ Have your say...

El Chupacabra: Mythical Creature or Mangy Mammal?

The chupacabra, or "goat-sucker" is known to some as a terrifying creature, undiscovered explained by science, and killing/mutilating animals in Miami, Nicaragua, Texas, and Mexico (among other locations - some spreading as far north as Maine, and as far south as Chile).  The name "chupacabra" originates from a report of dead goats, discovered in the mid nineties with puncture wounds in their necks with their blood drained...

The appearance of the creature is generally described as a reptile-like, appearing to have leathery or scaly greenish-gray skin and sharp spines or quills running down its back, with a dog or panther-like nose and face, a forked tongue, and large fangs.  It is said to hiss and screech when alarmed, as well as leave behind a sulfuric stench.  When it screeches, some reports claim that the chupacabra's eyes glow red which gives the witnesses nausea.

Another description of Chupacabra, although not as common, describes a strange breed of wild dog.  This form is mostly hairless and has a pronounced spinal ridge, unusually pronounced eye sockets, fangs, and claws. It is claimed that this breed might be an example of an unknown dog-like reptile. Unlike conventional predators, the chupacabra is said to drain all of the animal's blood (and sometimes organs) through a single hole or two holes.

Chupacabra is considered to be an Anomalous Biological Entity (ABE) - being either an alien species or a genetic experiment gone horribly wrong.  Whatever the case, those who believe chupacabra is an ABE also believe there is a massive government conspiracy to keep the truth hidden from people.

The photos to the above right are from real people who believe they have found dead chupacabras.  Watch the video below.  It indicates that county officials and scientists are "baffled" by the creature on video - even though a previous investigation proved the corpse of a similar looking "chupacabra" was that of a coyote.

But how could a coyote ever look like this?  How is this creature even possible? 

The natural explanation is equally terrifying as the chupacabra - the stuff of nightmares and horror movies... Behold- the Sarcoptic Mange Mite (Sarcoptes scabiei):

Sarcoptic Mage Mites are tiny arachnids and parasites to mammals.  They have no eyes, are 1/64th of an inch long and are covered with spikes.  They inhabit dogs, rabbits, foxes, racoons, humans, and many other furry animals. They use small suckers on their legs to hold onto their hosts.  After mating, female mites burrow into the skin of the host and use their jaws and front legs to cut the skin. They tunnel in the top layer of the skin where the female will lay her eggs.
 

The larvae will hatch from the eggs in three or four days and immediately crawl out of the burrow onto the surface of the skin, using the host's hair as shelter. Both larvae and adult mites eat the skin cells from their hosts. Once a larva has molted twice, it will be an adult and will mate on the surface of the host's skin.
 

The disease caused by these mites, is called "mange" or "scabies".  The mites contain a substance that causes an allergic reaction in the host's skin.  As a result, the skin becomes very itchy.
 
When the host scratches itself, it makes wounds that become infected by bacteria. The continuous scratching also causes fur/hair to fall out resulting in bald patches.  With severe cases, the animal will look entirely bald.  Animals with mange often suffer weight-loss since they are continuously fighting infection, itchiness, and exposed skin.

Look at the top three images of the chupacabra above.  The first two are of coyotes, the third is of a racoon.  It is relatively easy for scientists to test this by sampling the creature's DNA.


So is it an animal with mange, or the mythical chupacabra?  You be the judge.  Although it would certainly be more exciting to have discovered the remains of a chupacabra, often there are simpler, more mundane explanations for the mysterious.  In this case:  mangy mammals.

Incidentally, and as a side note, while researching the chupacabra, there are images of hairless bears (image to the right).  These are very rare, but look very similar to an animal struck with mange... 

UPDATE (March 29, 2011)
Scientific paranormal investigator Benjamin Radford has recently released a new book “Tracking the Chupacabra:  The Vampire Beast in Fact, Fiction, andFolklore".  Radford, with  a degree in psychology, says, "there are scientific ways to tell whether or not a given live or dead animal could possibly be an alleged chupacabra, based on their reputed characteristics."


If you think you've seen a chupacabra, Radford shares this checklist "derived from a close analysis of alleged chupacabra discoveries and comparison to known vampires:"


1) Was the animal actually seen attacking other animals?

2) If it was, was it seen or videotaped sucking blood from its victim(s)?

3) Was the suspected chupacabra victim autopsied by a qualified veterinarian or medical pathologist?

4) Did this veterinarian or pathologist conclude that blood had actually been extracted from the animal?

5) Does the suspected chupacabra have a mouth structure that would allow it to suck out blood?

6) Has the chupacabra’s saliva been scientifically tested for anti-coagulant and anaesthetic properties?

7) Has the suspected chupacabra’s digestive tract been examined for specialized vampire structures?

8) Has the chupacabra’s stomach contents been examined to determine if it lived on a diet of blood?

9) Have samples of the suspected chupacabra been subjected to DNA sequencing?

10) Has testing of samples of the suspected chupacabra’s skin conclusively ruled out sarcoptic mange?


If you can answer yes to all of the above, you might very well have the world's first scientifically legit chupacabra!




References:
http://paranormal.about.com/od/chupacabra/Chupacabra.htm  
http://www.cbsnews.com/video/watch/?id=6116827n 
http://en.wikipedia.org/wiki/Chupacabra
http://www.skepdic.com/chupa.html 


Monday, March 1, 2010 ~ Have your say...

Here Be Dragons

Here Be Dragons is a freely distributable video introduction to critical thinking.  Download it HERE.

Most people fully accept paranormal and pseudoscientific claims without critique as they are promoted by the mass media.  Here Be Dragons offers a toolbox for recognizing and understanding the dangers of pseudoscience, and appreciation for the reality-based benefits offered by real science. 

Here Be Dragons is written and presented by Brian Dunning, host and producer of the Skeptoid podcast, author of Skeptoid: Critical Analysis of Pop Phenomena, and Executive Producer of The Skeptologists and Truth Hurts.

Related Posts Plugin for WordPress, Blogger...