Our Life is From Space???

Some scientists argue that life on Earth originated from outer space. Based on their theory, in the past the Earth once bombarded by asteroids that once brought the molecules of life.

Is it true that opinion? Lately, evidence is growing stronger. In 2009 Dr. Daniel Glavin find amino acid molecules in a fraction of asteroids that successfully reached the surface of the earth.

Amino acids are the basic building blocks of protein molecules, ie molecules that play a major role in life, from digesting food to immune function. Amino acids found in meteorites that is L-isovaline.

The evidence is strengthened by recent findings Glavin. Astrobiologi expert who became researcher at NASA's Goddard Space Flight Center in Greenbelt, this time finding the amino acids in meteorites 9 units.

In the studied meteorites, Glavin found that all amino acid-rich species L. Several others have amino acid amino acid L and R are balanced. None of the amino acid-rich R.

L amino acids are found in many kinds of living things. R amino acids seen from its structure is the "mirror" or the isomer (chemical term) of the amino acid L. R amino acid found only in bacteria and several species of sea slugs.

With these results, Glavin said, "This is evidence that the discovery of the past is not a coincidence. Indeed there is something that happens so that this meteorite is also rich in amino acids of L."

Glavin said the results of this study is also a clue. If life on earth consisted mostly of amino acids L, is not impossible that these molecules are actually derived from meteorites.

"The meteorite, meteorite amino acids may send L to the earth which will eventually help the formation of 'soup' prakehidupan. It could be a clue that we are destined to be a living being L," he said.

Glavin research results published in Meteoritics & Planetary Science, published January 17, 2011. Among the nine meteorites studied Galvin, one of which is Murchison which hit Australia in 1969.

In his research, Glavin also found that water had a role in increasing the number of L amino acids. Glavin found the existence of hydrated minerals (reacts with water) on the amino acid-rich meteorites L.

"Water seems to be the key. The more asteroids are in contact with water, the more L amino acid which is found," he said. However, the mechanism of water increases the amount of the amino acid L is unknown.

Meanwhile, Glavin also touched on the role of radiation in the dominance of the amino acid L. Cosmic ray radiation during solar still may be a bit young to support the creation and destruction of the amino acid L amino acid R.

All results can be a clue that other parts of the solar system was dominated by the amino acid L. So, if there is life on other parts of the solar system, life must also be dominated by the amino acid L.

"We seem to not want to see a reflection of the L amino acids in our solar system," Glavin said in an interview with Nature, January 19, 2011. L amino acids are often called left-handed amino acids.