Is the Great wall of China Visible from the Moon?

cześć skeptics,

Today I am going to be talking about one of the most scientifically ridiculous memes in popular culture. Most people seem to believe that the Great Wall of China (http://en.wikipedia.org/wiki/Great_Wall_of_China, if you have lived under a rock your whole life) is the only man-made object visible from space, or from the moon, depending on your myth. It has appeared in every fact book or app I have ever read, and is one of the most popular myths in society. However, this myth is wrong on almost every conceivable level, which I will delve into today.

The level most impossible in this story is the idea that the Great Wall of China is the largest man-made object on earth. Even if it is true that the Great Wall of China is visible from space, the moon, or where ever, the Great Wall is not going to be the only thing visible. Consider the Great Wall of China. It is a pale white-brown coloured wall, and is, in the stretches of best condition, a few meters wide and in reasonable condition. It is very, very long, and in the bad stretches it is no more than rubble remains, in some stages. The Wall, when viewed from above, is a pale brown colour on a backdrop of green or brown mountainous area. This in itself points out something, a brown coloured anything on a similarly coloured background, is not going to be clearly visible from any reasonable distance, due to a low contrast.

Now consider other things which are of similar shape and/or size. A four or six lane highway, large buildings like the pentagon, and sports stadiums are all wider than the great wall of china, and would be sighted quicker due to their greater contrast in background. A 6 lane highway is black, on an often light or grey coloured background, the pentagon is grey on a green background, and sports fields are green and often situated in cities, grey in colour. So it is clear that the Great Wall of China is not the most contrasting in its background, or the largest man-made object around. So there are things more visible from afar than the Great Wall.

The second problem with this myth, is the facts. The two myths being questioned here, both have different answers on this subject. The Great Wall of China is NOT visible from the moon, but is visible from low earth orbit, just like highways and buildings.

The third speed-bump in this myth is the definition of space, a big question, with no real answer. I have already mentioned one possible definition of space, low earth orbit, the orbit which is taken by the space shuttle and others, allowing for orbit of the earth every 90 minutes. Another definition would be when 99% of the earths atmosphere is below you, then you would be in space. It could be the geostationary orbit taken by our GPS satellites. There are many possible choices, and the point is, space is not clear-cut, so when a claim is made about something being visible from space, you have to ask which space it is visible from.

The myth that the Great Wall of China is visible from the moon is ridiculous, while the idea that the Great Wall of China is visible from space is very blurry, and is only visible along with all of the other big things we have made.

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Is Democracy What people Think it is?

Hallo Skeptics,

Today’s post comes to you from a quote I read from Isaac Asimov recently which got me thinking about democracy. “Anti-intellectualism has been a constant thread winding its way through our political and cultural life, nurtured by the false notion that democracy means that ‘my ignorance is just as good as your knowledge.” This quote is an extremely well written way of saying what has been said for a long time by skeptics. When I saw it, it made me think about what democracy truly means. For obvious reasons, as pointed out by this quote, ignorance and knowledge are not equal in a good society.

A meme around in the religious/atheist interplay is the notion that in most cultures, the percentage of people who believe in god, and those who believe in creationism is extremely high. A study in the United States showed that 43% of Americans believe the earth was created in its current form less than 10 000 years ago. Apparently, to the religious, this points towards the truth of creationism. They say “Surely 43% of Americans can’t be wrong!”, as a good skeptic, you would immediately point this out as an argument from popularity, ad populi (latin makes you sound much smarter). No amount of belief makes something fact. The universe doesn’t care what people think, it just does what it does.

The view that many people have of democracy is that everybody has an equal say in the running of a country. However, as highlighted by Isaac Asimov’s quote,  this doesn’t seem like the right think to do. If 40% of the population believe in a talking snake, oh wait, they do, bad analogy, if 40% of  the population believe that the best thing to do in today’s evil society is flood it… Damn it, another bad analogy… if 40% of the population believes that toothpicks would be the best weapon for army soldiers, it is the job of the logical people in society to tell them that’s retarded.
A real democracy is not about having an equal say, it’s about having a fair say. And what is important about a fair say is open discussion and debate. It doesn’t matter what 40% of the population think, if they can’t defend what they think in a debate, then their fair say shouldn’t be as much of a say as those who are better at defending their position.

The ideal democracy is one with plenty of open debate and criticism of all views and opinions, and this is how society should be run.