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iquestor
2013-Oct-09, 04:52 PM
Are Earthlings really Martians?

That’s the controversial theory proposed today (Aug. 29) by respected American chemist Professor Steven Benner during a presentation at the annual Goldschmidt Conference of geochemists being held in Florence, Italy. It’s based on new evidence uncovered by his research team and is sure to spark heated debate on the origin of life question.


Read more: http://www.universetoday.com/104399/are-we-martians-chemists-new-claim-sparks-debate/#ixzz2hFDXcaQx


more... (http://www.universetoday.com/104399/are-we-martians-chemists-new-claim-sparks-debate/)

Dr benner states that
“We have chemistry that (at least at the level of hypothesis) makes RNA prebiotically,”

what does that mean? I mean RNA is pretty complex. Just because you hve the raw materials doesnt mean it will self organize. This seems like a giant stretch....

Selfsim
2013-Oct-09, 07:59 PM
Duplicate thread to this one .. (http://cosmoquest.org/forum/showthread.php?145936-Did-life-here-start-out-there)

Buttercup
2013-Oct-09, 08:02 PM
Good grief, haven't you read the book?? :mad:

I'm from Venus! :D

...p.s.: I hyperjumped to Coruscant about 552 years ago.

KaiYeves
2013-Oct-09, 09:00 PM
Many of us on this site are certainly ASPIRING Martians...

ravens_cry
2013-Oct-09, 09:44 PM
Says you. I won't be happy until I can apply for Andromedian citizenship.:D

Noclevername
2013-Oct-10, 12:13 PM
Says you. I won't be happy until I can apply for Andromedian citizenship.:D

Baby steps first, baby steps.

lpetrich
2013-Oct-13, 04:12 AM
Making RNA with prebiotic chemistry? That's awfully difficult. Here are some skeptical articles by origin-of-life researcher Robert Shapiro:

Prebiotic ribose synthesis: a critical analysis. [Orig Life Evol Biosph. 1988] - PubMed - NCBI (http://www.ncbi.nlm.nih.gov/pubmed/2453009)
The prebiotic role of adenine: a critical analysis. [Orig Life Evol Biosph. 1995] - PubMed - NCBI (http://www.ncbi.nlm.nih.gov/pubmed/11536683)
Prebiotic cytosine synthesis: a critical analysis and implications for the origin of life. [Proc Natl Acad Sci U S A. 1999] - PubMed - NCBI (http://www.ncbi.nlm.nih.gov/pubmed/10200273)

He points out that ribose is difficult to make prebiotically. One needs some high concentration of formaldehyde, and the Butlerov formose reaction produces oodles of sugarlike molecules, many of them differing from various others by different asymmetries. He states: "Ribose has been identified (yields are uncertain, but unlikely to be greater than 1%) in reactions run with concentrated (0.15 M or greater) formaldehyde."