We may all be space aliens: study
June 14, 2008 11:48am CST
Genetic material from outer space found in a meteorite in Australia may well have played a key role in the origin of life on earth, according to a study to be published on Sunday. European and US scientists have proved for the first time two bits of genetic coding, called nucleobases, contained in the meteor fragment, are truly extraterrestrial. Previous studies had suggested the space rocks, which hit earth about 40 years ago, might have been contaminated upon impact. Both of the molecules identified, uracil and xanthine, "are present in our DNA and RNA," said lead author Zita Martins, a researcher at Imperial College London. RNA, or ribonucleic acid, is another key part of the genetic coding that makes up our bodies. These molecules would also have been essential to the still-mysterious alchemy that somehow gave rise, about four billion years ago, to life itself. "We know that meteorites very similar to the Murchison meteorite, which is the one we analysed, were delivering the building blocks of life to earth 3.8 to 4.5 billion years ago," Martins told AFP in an interview. Competing theories suggest nucleobases were synthesised closer to home, but Martins said the atmospheric conditions of early earth would have rendered that process difficult or impossible. A team of European and US scientists showed the two types of molecules in the Australian meteorite contained a heavy form of carbon - carbon 13 - which could only have been formed in space. "We believe early life may have adopted nucleobases from meteoric fragments for use in genetic coding, enabling them to pass on their successful features to subsequent generations," Martins said. If so, this would have been the start of an evolutionary process leading over billions of years to all the flora and fauna - including human beings - in existence today. The study, to be published in Earth Planetary Science Letters, also has implications for life on other planets. "Because meteorites represent leftover materials from the formation of the solar system, the key components of life - including nucleobases - could be widespread in the cosmos," said co-author Mark Sephton, also at Imperial College London. "As more and more of life's raw materials are discovered in objects from space, the possibility of life springing forth wherever the right chemistry is present becomes more likely," he said. Uracil is an organic compound found in RNA, where it binds in a genetic base pair with another molecule, adenine. Xanthine is not directly part of RNA or DNA, but participates in a series of chemical reactions inside the RNA of cells. The two types of nucleobases and the ratio of light-to-heavy carbon molecules were identified through gas chromatography and mass spectrometry, technologies that were not available during earlier analyses of the now-famous meteorite. Even so, said Martins, the process was extremely laborious and time-consuming, one reason it had not be carried out up to now by other scientists. http://au.news.yahoo.com/080613/2/179x8.html?f=mv
5 people like this
• Zaragoza, Spain
22 Jun 08
hello there to U...wow, that's really fascinating and stunning to me...i can't really imagine that humans may all be space aliens... As a Biological Science student in College, it's really hard for me to believe that humans can be aliens... It's because the chromosomes of our mother and father both consists of 23 haploid numbers of chromosomes, and the total or the diploid number of chromosomes all in all is 46... Scientifically, i would say that's it's so impossible for humans to become an alien...even if we're gonna say that we might be aliens but it does not have scientifically basis or brief evidences that we are all can be aliens... That's too way impossible, not only scientifically , but also based on the theory of Natural Creation... For example is the cell, it's the basic unit of life, but LOL, does an alien have cells too? Maybe, i'll agree because if they realy existed, they can be living organisms too like us, human beings... But this cool and informative news you've posted really fascinated me...i really became interesting with this really cool discussion of yours... But i don't know if i'll believe it or not...i'm in the process of "in the middle," maybe it can be a fact or not... Wow, this is really an amazing and cool discussion...i would admit that i really love all your discussions no matter what's the topic, they are all interesting and informative...i've learned all about your discussions here on Mylot, i just love reading them all... You have a blessed sunday...may GOD BLESS U & UR family always!!!
22 Jun 08
All they mean by "Aliens" is that if we come from somewhere else in this Universe... we are actually aliens to the planet Earth. Their discovery don't mean that we are the descendants of some aliens. I think it has more to do in explaining that living organisms are floating in the Universe... and under the right conditions... those living organisms can create life as we know it by evolving to adapt to the conditions of the planet they landed on.
2 people like this
• Zaragoza, Spain
23 Jun 08
If that informative and cool news is really a fact, i would say that's really cool...but it seems to me that it isn't true... Based from the fact that living organisms lives in Biosphere...it's the part of the Earth occupied by living organisms...but maybe i would still assume that we humans can still be called "aliens." I don't know but it's really hard to believe because there are so many biological reasons why humans cannot be called aliens maybe it's because i really believe in the Theory of Divine or Special Creation or we can call it Natural Creation... But i really find it so interesting to believe it...your awesome explanation is really amazingly cool and interesting...it's just that i don't believe in Cosmozoic Theory... If only there are basic facts and specific evidences to prove that it's really true...actually, i really want to thank you for sharing that wonderful and cool information here on MyLot...it's so interesting and i've learned a lot from it...i really love reading all your discussions, you are really awesome and so cool... You have a blessed monday...may GOD BLESS U & UR family with more and more blessings!!!
24 Jun 08
wow! if we're space aliens i wonder who are the real or original creatures that might have given way to our existence. this research only explained the origin of rock and their location and motion development. I'm wondering how God isn't in the picture.
• United States
14 Jun 08
There would have to be a lot of information for me to really think that I could be an alien. I think that if it was really so even with what you have given as proof. They would have said something about it by now. Now what i can take in is that it could be other life out in the universe that we don't know of yet. The rock only explains that. Another thing that would really top it off is to determine where the rock that they used to examine really came from. What part of the universe and how far it traveled before reaching earth. Have a nice one.
• United States
24 Aug 08
Phucking hell plooker. I have been waiting for a month for Aussie to comment on my response to his Cameron Diaz discussion and now you are going to send him back into hiding! I deleted you from my friends list because I finally concluded that you have no interest in me actually, it is just Aussie that you are interested in. But then you go and 'concur' with me in such an intelligent fashion that it makes me love you all over again! But I refuse to 'gang up' on Aussie with you... in spite of the fact that he seems to friggin' ASK for it!
• United States
23 Aug 08
I think its very likely that we do in fact share some of the same matter as aliens do. I would not be surprised by this, because there could easily be other life forms with the same or similar origin of matter. Who are we to think that we are all there is? We dont have even have enough knowledge to rule this out , not with the vast heavens and black holes. It s even possible they are somewhere out there asking each other the same questions that we ask.We dont know where all this matter could have landed and in how many places or how many times. There is some speculation that references to revelations in the bible is refering to some of these aliens or other beings.This could also explain some of our strange behaviors here on earth...lol
23 Aug 08
While some matters and molecules are unique to earth after having been created on earth through mixtures and evolution... The original matter to start it all... came from the universe... and would be found through the universe. You just need certain specific conditions for that matter to evolve into something else.