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Comment Re:How much you ask (Score 1) 405

Didn't say it was mundane. The mechanisms that are responsible for basic molecular biology (DNA replication, transcription and translation of genes, nucleotide synthesis, etc) tend to be exceptionally well preserved across all domains of life, and in this particular case, a big mutation somewhere in there managed to be adaptive, which is extraordinary. This discovery and the inevitable decades of future work on this species from every field of biology/biochemistry is without doubt Nobel material. However, it wouldn't change much of the wider theoretical background about origins of life, evolution and whatnot.

Comment Re:Great (Score 1) 405

The Gizmodo article only says that these new bacteria have arsenic instead of phosphorus in their DNA, which is not enough information to understand just how ground-breaking it is. Mind you, arsenic is in the same group as phosphorus, so their chemical properties are comparable. If the rest of their chemical makeup is the same (deoxyribose for a sugar, same set of nitrogenous bases, etc), then it's most probable that they evolved from regular bacteria under the extreme conditions of that lake (such as lack of phoshorus and over-abundance of arsenic). While that would be extremely interesting for biochemists, microbiologists and other scientists, it won't change our general understanding of life much. Now, if arsenic was just the first indication that this form of life is different, and further study will reveal completely different biochemistry as well, then we can talk about possible implications for extra-terrestrial life and all that universally exciting stuff.
Earth

3D Images Reconstructed of 300M-Year-Old Spiders 88

Hugh Pickens writes "Scientists at Imperial College London have created detailed 3D computer models of two fossilized specimens of ancient creatures called Cryptomartus hindi and Eophrynus prestvicii, closely related to modern-day spiders. The researchers created their images by using a CT scanning device, which enabled them to take 3,000 X-rays of each fossil then compile them into precise 3D models, using custom-designed software. Both spiders roamed the Earth during the Carboniferous period, 359-299 million years ago, when life was emerging from the oceans to live on land. C. hindi's front pair of legs were angled toward the front, suggesting they were used to grapple with prey, an 'ambush predator' like the modern-day crab spider, lying in wait for prey to come close. 'Our models almost bring these ancient creatures back to life and it's really exciting to be able to look at them in such detail,' says researcher Russel Garwood, adding that the technique could be used to return to fossils that have previously been analyzed by conventional means. 'Our study helps build a picture of what was happening during this period early in the history of life on land.'"

Comment Re:The DNA code is universal (Score 1) 368

The code might be (well, is) universal, but the control of what is translated at any given time is not. If you put human genome into a plant cell, you definitely won't produce a human, because cytoplasmic determinants that are present in human eggs are required to make sense of it all. Strict regulation of genes is crucial to the correct development of an organism, and the regulatory factors tend to be species-specific. Other stuff that has been mentioned (methylation, unique structure of genes, etc) also make things difficult.

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