Tag Archives: SCIE300

Fact or Fiction?

Now, I’m sure many of us have fallen for some very untrue facts in science.
Here I’ve collected just a few commonly believed myths, and their real explanations!

Myth #1 
People explode in space
Here, we are assuming being unprotected in space, such as a leak in a space suit or some other hazardous accident.

Astronaut
From DeviantArt, User ~Master-Fri

So to clarify,

No, no people do not explode in space and their blood does not boil (unlike what we’ve seen in various SciFi movies). The containing properties of your skin and circulatory system prevent this. 

There would be some swelling of course, loss of oxygen leading to unconsciousness  There would also be skin burns due to being unprotected closer to the sun.

An incident which occurred at NASAs Manned Spacecraft Center (now renamed Johnson Space Center) in 1965 gives us a better idea of what would happen if one was exposed in a pure vacuum, much like space. A test subject was in a  near-vacuum condition, when his space suit started to leak. After about 14 seconds, he fainted. After the chamber was re pressurized  he regained consciousness.  Now obviously we can not be sure exactly what happens, as I’m sure no one would offer to be the test subject, but based off of what we currently understand about space and pressure, we are quite sure that we do not explode. Or boil. Sorry SciFi fans.

Myth #2
Five Second Rule!

Hand Sanitizer
From Wikimedia, User Sean Narvasa

Okay, even I have admitted to doing this. Dropping a piece of food on the ground, picking it up and yelling five second rule, as a way for me to justify eating whatever it is I had dropped without having to worry about germs. This is terribly wrong.

As soon as a piece of food hits the floor, it will stick to whatever germs happen to be there. Now, this doesn’t mean you can’t eat the food, it just means that you may possibly be ingesting a harmful bacteria. And get sick. Up to you.

Myth #3
Brain Cells Can’t Regenerate

Brain
From Flickr.com, User digitalbob8

This was thought to be true for a very long time, until a discovery in 1998, by Sweden and at the Salk Institute in La Jolla, California. The learning and memory center of the brain can regenerate new cells!

Now you can’t be fooled into thinking brain cells can’t regenerate,  but that does not stop you from lightly bopping a friend on the head and saying “Uh oh, you’ve just lost brain cells!”. Not that anyone did that to me as a kid, causing me to worry that I would grow up not knowing anything because I lost all my brain cells… *cough*

And that’s it folks! Want to know some more neat myths? The video down below mentions some of the most common scientific myths

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Video found on Youtube from user alltimetens

-Christina

Owls; Their Amazing Head Turning Ability Solved

Owls are known for their ability to turn their heads “All the way around”, but have you ever wondered why?

Owl perching by Peter Trimming

Well first off,  contrary to popular belief, owls are not able to turn their heads the full 360 degrees. Most owl species, but not all, can turn their heads up to 270 degrees. The reason why they have adapted this ability is thought to be linked to the fact that unlike humans, with movable oval eyes, owls have tube like eyes that do not have the ability to swivel much.

If a human snapped their neck at the speed and angle that owls are able to do, there would be severe trauma to the neck and arteries, or completely stopping the blood flow to the brain. To test how this works, researchers, led by Fabian de Kok-Mercado, injected dye into the blood stream of dozens of owls, and used a CT scan to track the flow of dye throughout the bloodstreams of the owls.

After the CT scans were completed, they then injected a plastic like substance into the blood stream, let it harden, then dissected the owls to find out how the arteries were oriented.

Northern spotted owl by user USFS Region 5
Via Flickr

It was found that the owls neck bones, or vertebrae, contain holes that are much larger than those found in humans. In humans, the holes are just about as big as the arteries, whereas in owls they are about 10 times larger. These likely contain air sacks meant to cushion the twisting motion of the neck. This may explain why the blood vessels do not break during the rapid head turning motions of the owls.

The researchers also noticed that the artery slightly enlarges as it gets closer to the head. This is thought to allow blood to pool so that the brain has extra blood to work with as the head swivles.

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Above is a video explaining the details of how owls are able to turn their heads up to 270 degrees. [By user SciFri via Youtube]

And there you have it, the science behind how owls can turn their head at great angles. Wouldn’t that be cool if humans can do that to?

Okay, maybe not. Lets leave this to the owls.  

-Christina Bell

Laughter is the Best Medicine?

Now I know, we’ve all heard time and time again “Laughter is the best medicine”, but where did this saying even come from? Is there any scientific backing to this?

Laughing child
(Picture from Pixabay.com, user Greyerbaby)

Well, turns out there is.

Dr. Lee Berk, an associate professor  at the School of Allied Health Professions at Loma Linda University, has been studying the effects of laughing, or humor, on the human body for years. In one of his experiments in the 1990’s, it was found that after watching something comedic, or funny, ones immune system created more t-cells, which are essential for fighting off infected cells in the body. Watching something funny and laughing ‘mirthfully’, as he describes it, helps to lower ones blood pressure, and improves the function of blood vessels.

It is also known that laughter releases endorphins in the body, which are neurotransmitters, responsible for the the ‘feel good’ chemicals of the body. Laughing also helps to relax muscles, and decrease pain.
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Video: youtube user LifestyleMagazine08
Above is a video of an interview with Dr. Berk himself explaining his work, and some of his findings.

Researchers estimate that laughing 100 times is near the equivalent of using a rowing machine for 10 minutes, or an exercise bike for 15 minutes! Did you ever wonder why after a good long laugh you have trouble breathing, or your abdominal area hurts? Its because laughing is near the equivalent of an aerobic workout! Just make sure your laugh is a full and hearty one, fake and/or light laughter is not nearly as effective.

So next time you’re feeling under the weather, don’t mope about it. Pop in a funny movie and let your laughter help heal you!

-Christina Bell