Is the world really supposed to end in 2012?

This whole saga of the world is going to end in 2012 came from the predictions in the Mayan calendar. The last day on the Mayan calendar which ran for 5,126 years is on December 21, 2012.

My personal view is the calendar has to end somewhere. It could have been any other day. So I do not believe the world is going to end.

What will be interesting is .. if you are into astronomy (and the mayans were great astronomers I must add) on December 21 2012, the sun will be aligned with the center of the Milky Way for the first time in about 26,000 years! :)

* this is taken from my YA.
http://answers.yahoo.com/question/index;_ylt=AskqjyInXF6jJxPMmJQzelPty6IX;_ylv=3?qid=20090926164559AAYiSpo&show=7#profile-info-gKEZaMNlaa

Origin of Eye, Hair and Skin color

Eye, hair, and skin color differences are all result of genetic mutation. Haha mutation may sound scary, but it in fact occur rather frequently as we pass our genes from 1 generation to the next.

Now we know these lighter genes originated from northern Europe, why do they evolved lighter genes? Geographical location is a good indicator of how much sunlight these folks are getting. Lighter skin absorbs sunlight (or rather UV radiation from the sun) better. Vitamin D is then made in our skin. However, sunlight exposure carries a number of risks, one of which - skin cancer.

No one really knows our ancestors exact skin, hair and eye color. By theory of natural selection it seem lighter skin adapts better to the conditions in norther Europe, those that failed to adapt, died leaving the lighter genes folks to pass their genetics to the next gen. These people later traveled long distances due to climate changes, and their genetics got spread around the world. Google on the geographical distribution and you will find out where on earth have the highest concentration of people with green eyes and blond hair!

I have grossly simplified how genes got passed on to the next generation.

reference:
http://www.sciencedaily.com

* this is taken from my YA.
http://answers.yahoo.com/question/index;_ylt=Ag6EsrOqEpwDWTFg19c5K5vty6IX;_ylv=3?qid=20090810013257AAHhhd3&show=7#profile-info-EVo16a1Paa

Where do Green Eyes and Blond Hair originate from?

Where do green eyes originate from?
- Northern and Central Europe.

What about blonde hair?
- If you mean where it first appear, Northern Europe.

And does the shade have anything to do with where, or does that just depend on how much color is in them?
- Yes, depending on geographical location.

And what if no one in my family has green eyes?
- Think of mixing 2 or more paint to get a new color, this is exactly the same! We usually get 2 genes, 1 from each parent. Will explain a little about blue / brown eyes before we get to green. :)

To get:
- Blue eyes = blue + blue
Baby need to inherit 2 genes of blue to have blue eyes.

- Brown eyes = blue + brown or brown + brown
Since brown is more dominant, if the baby inherited 1 brown gene, the baby gets brown eyes.

So, if my mom has blue eyes, and my dad brown, and I get 1 blue gene from my mom, 1 brown gene from my dad, I will have brown eyes. BUT rememberer, I still have 1 blue gene in me ... if I marry someone with brown eyes (but he had also inherited a blue gene), there is a good chance we both pass on the blue gene. That is why your eye color may be different from both your parents!

Ok, and so we get to green, which ... is a little more complicated. :)

The gene for green eyes is dominant over blue eye color, but is recessive to brown. So what color eyes could a baby have if one parent had green eyes and the other parent had brown eyes? Since the genetics of eye color is quite complex and poorly understood, the real answer is that the baby could have almost any eye color from hazel to blue.

* this is taken from my YA.
http://answers.yahoo.com/question/index;_ylt=Ag6EsrOqEpwDWTFg19c5K5vty6IX;_ylv=3?qid=20090810013257AAHhhd3&show=7#profile-info-EVo16a1Paa