lfes far flung raw materials
Sometime during our lives, we've questioned ourselves at one point just how long has the earth existed and how did life begin? Our Biology book written by: Solomon, Berg, and Martin, shows theories that has taught us that earth is approximately 4.6 billion years old, and the earliest pieces of life form found was dated back to approximately 3.8 billion years old. This only leaves a time space of 800 million years between the formation of earth and the creation of life. Since then, new theories have shown that life may have originated earlier then they thought. From Bernstein, Sanford, and Allamandolas' article, "Life's Far-Flung Raw Materials" comes the theory that only about 100 million years after the earliest possible point for earth to support life, evidence shows that organisms were already flourishing. But with the amount of time between this
It is stated that everyday, tons of space dust falls to the earth's surface, some found containing 50% organic carbon, bringing in about 30 tons of organic material. So not only do some scientists argue about space particles bringing in water and gases, but they could also bring in "ready-made-organic molecules such as the ones seen today. From the meteorites that hit the earth they were able to find a variety of 70 amino acids, but only 8 are used by living cells to build proteins. These meteorites also show such compounds including: nucleobases, ketones, quinones, carboxylic acids, amines, and amides. Astronomers have seen a variety of these organic compounds in the universe and more abundantly in clouds. In conclusion, it is easier for us to believe that extraterrestrial compounds were present during the time of this evolution a
Some common words found in the essay are:
Christopher Chyba, Berg Martin, Raw Materials, , Sanford Allamandolas', bringing water, extraterrestrial compounds, space particles, amino acids, seen meteorites, living organisms, development earth,
Approximate Word count = 577
Approximate Pages = 2 (250 words per page double spaced)
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