NASA Ames Reproduces the Building Blocks of Life In Laboratory

hypnosec writes "Scientists at NASA's Ames Research Center have reproduced non-biologically the three basic components of life found in both DNA and RNA — uracil, cytosine, and thymine. For their experiment scientists deposited an ice sample containing pyrimidine — a ring-shaped molecule made up of carbon and nitrogen — on a cold substrate in a chamber with space-like conditions such as very high vacuum, extremely low temperatures, and irradiated the sample with high-energy ultraviolet photons from a hydrogen lamp. Researchers discovered that such an arrangement produces these essential ingredients of life. "We have demonstrated for the first time that we can make uracil, cytosine, and thymine, all three components of RNA and DNA, non-biologically in a laboratory under conditions found in space," said Michel Nuevo, research scientist at NASA's Ames Research Center, Moffett Field, California. "We are showing that these laboratory processes, which simulate conditions in outer space, can make several fundamental building blocks used by living organisms on Earth."

Comments

Re:Space

[Anonymous Coward]

We have already found that Pyrimidine occurs naturally in space:
http://en.m.wikipedia.org/wiki/Murchison_meteorite

Re:Space

[Rei]

I don't think this is at all special. There have been tons of space-matter-abiogenesis experiments that have been done, with similar results. For example, it's been shown that Titan's atmosphere can produce at least 16 amino acids and all five nucleotide bases, and we've already detected organic molecules over 10000 daltons there.

Nature likes to produce rather complex mixtures of organic chemicals without any help from life, nobody should doubt this any more, there's been way too much evidence that it happens. Nature is more than happy to continously rain down vast amounts of varied, complex organics given the right situation, providing both potential organic catalysts to develop into early life and "food" that they can scavenge. The question that needs to be answered next is, from a random diverse mix of organics, how does a hypercycle get started, wherein some chemicals / mixtures of chemicals / families of chemicals begin to encourage the creation of more chemicals "like" them, increasing the odds that there will be more produced of whatever is needed to keep the cycle going. Once you get to that point, you have the potential for evolution to take hold - first by a simple race to produce the most exact copies of the most efficiently-catalyzing chemicals and the poisoning of competing chemicals, up to the development of membranes to provide defense/hoarde resources/survive adverse situations/etc (the first "ur-cells").