The Origin Of Life | Cell | BBC Science
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- čas přidán 7. 09. 2024
- At Imperial College, astrobiologists have spent years analysing molecules within meteorites. One sample in particular dates from 4.5 billion years ago and has made a huge impact on genetic codes.
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The Cell 2009
Embark on a compelling, mind-blowing, and complex journey through 300 years of history to discover the secrets of the cell - and of life itself. In this fascinating series, Dr Adam Rutherford delves back through time to the first observations of the cellular structure of plants; the search for the secret of life that led scientists deep into the inner workings of the cell; and to modern research in synthetic biology that could see us create life from scratch. It is a story of rivalries and secrecy, mistakes and accidents, and sudden insights that have overturned scientific and religious dogma.
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Not to oversimplify. There is no DNA in these meteorites, only signs of uracil, one of the nucleoside bases that comprises RNA. Neither does it prove that "life is extraterrestrial in origin", but it does point to the rich stew of organic building blocks that the Earth inherited from the solar system.
Have you heard about RNA(uracil) world??
RNA is the primitive nucleic acid for all the organisms at the initial stages but DNA has evolved as a genetic material because of it's stability.
DNA is more stable than RNA because of the presence of thymine group in DNA
In RNA uracil is less stable so it is more vulnerable to mutations. This property makes RNA as genetic material in viruses evolve at faster rate and undergo mutations
And yet this evidence proves that the building blocks for life and our DNA was around even before our planet EARTH was even created. But the bible does have some right still in our creation, except for the fact that the first man was not formed as the bible says. The bible after all is a theory (not physical proof) of how the existance of the universe was made. The bible today is more of a guide to everyone to assist in living life and full of knowledge to help you through your challenges. As a source of knowledge the "Bible" is important cause it contains stories and scriptors to help understand many of lives challenges except for how we were made. Science will always explain this as it is backed up by PHYSICAL evidence.
😅
@@brettaslin1868 🤣🤣
@@brettaslin1868What you say about the bible only applies to SOME believers. I don't believe you've expressed the consensus about the bible - because there isn't one - unlike the science .
These clips really should come with notification of an original transmission date. Science moves on, after all…
This is from 26 Aug 2009!
3:10 You have to be really careful and not mess up
Proceeds experiment IN THE DARK
That molecule displayed on the screen contains silicon ("Si"). Whatever this is - it's not an amino acid.
No, it most certainly not an amino acid. It is part of a nucleoside base (part of a nucleic acid) found in RNA, that is fascinating because it has silicon attached to it. Silicon is not part of any functioning nucleic acid on earth. It's unfortunate that some people watching this video think it has anything to do with amino acids. That should have been clarified in the footnotes.
@@hyperian_one Indeed. Organic compounds can be obtain abiotically. Still, the sequences even for sugars it's incredibly hard to obtain. That compound in the video is not a chiral one. When chirality comes up, any trying in laboratory to obtain chiral compounds it's a mess. And except glycine, all amino acids are chiral. And there are a lot of types of chirality (central, axial, helicoidal, etc.)
We can't obtain (without a living organism, such genetic engineered bacteria, or enzymes (which again are proteins produces by living organisms)) same sequences as in proteins. It get worse: folding proteins it's an enigma. There is a no known process (again without the use of another living organism) to fold proteins as in our body.
@@radupopescu9977the entire ocean was at one point a stew of acids. It can’t be replicated because of the size of the experiment needed. The heat, the pressure, the variety of acids, the bombardment of meteorites and volcanoes and water, along with massive lightning storms… how do you replicate that in a lab? You simply can’t. We are not talking about billions, but trillions or more of individual interactions between different acids under different conditions over billions of years until there was a match between nucleic acids to form the first RNA strand. Then we are talking another several million if not a billion years till DNA and a single cell bacteria rose out of that equation. It’s not an enigma. We just can’t recreate the conditions to witness it ourselves, there is a difference.
Glad folks were around to answer this question because this is exactly what I was thinking!
@@radupopescu9977 Thanks interesting info!
How old is this video? because I thought that we had now found all of the amino acids that are present in life within meteorites
If it’s from documentary series, “The Cell”, then we’re talking an original broadcast in 2009.
We only found Uricil, a nucleotide base that comprises RNA.. and even if you found an entire genome, it would just sit there doing nothing, as far as we currently understand.. because DNA does nothing on its own.. human beings still don’t understand what life is or how it works.. when something dies, all the DNA is still right there.. life is not simply DNA or parts.. think critically always
This is not very good isn't it? The video is titled origin of life, then we talked about molecule as complex as DNA. But the discovery is nothing about the molecule DNA, but just a base of the DNA. There is a huge gap in what is described vs what actually the discovery is. Of course we already know that we are made of star stuff. And organic materials of course have been observed in space by telescope. I wished these videos are headlined more like science than tabloid.
This is only part of a larger BBC Documentary and it is discussing what we know about the Origins of Life. I think what you desire are concrete answers to the big questions. Well, those don't exist.
Umm, how did you figure something is 4.6 billion years old? Is this data published? Where? This science looks more like a produced television show than science. Zita is not an actress? If she isn't, she really should go that direction because she has talent.
A new book published by Austin Macauley Publishers titled From Chemistry to Life on Earth outlines abiogenesis in great detail with a solution to the evolution of the genetic code and the ribosome as well as the cell in general using 290references, 50 illustrations and several information tables with a proposed molecular natural selection formula and a worked example for ATP.
Z Martins is a major contributor to origin of life research and features in the book.
Nice chemistry between
Thanks for uploading❤
Great combination... we are stardust and part of some advance human lifeform
Thank you
Panspermia is one possible origin of life, but with a rich soup of chemicals in Earth's early oceans and 100s of millions of years to combine them, I believe life originated right here on our home planet.
Apparently BBC still takes viewers to be the 70s grandpa watching TV in the pauses when his afternoon siesta in the rocking chair is disturbed
Fred Hoyle and Chandra Wickramasingha wrote a book about the idea of panspermia in the 1980’s. That proto-organic material is spread throughout the cosmos and falls to earth in comets and meteorites. I’ve always found it an attractive idea.
I can’t say that I really understand all this stuff, but undersea hydrothermal vents and protein gradients seems a more plausible explanation
I keep thinking of how the sample could have been contaminated. The rock crashes, perhaps it got into contact with water, people are handeling it, contaminations happen in labs everyday. I would like to learn more about that and how this would be unlikely and thus the conclusion can be drawn it is extraterrestrial.
Also, discovery of oxygen production in deep ocean bottom (Andrew Sweetman) opens up new questions about where life might exist or emerge, e.g., on whar exoplanets conditions might be interesting.
So you find a box of letters. Throw them up in the air and they write a book?
Anaxagoras was way ahead of us.
Very nice and informative. Thank you
The probability of randomness creating proteins and then those proteins randomly sorting and bonding to others in the correct order to create the primordial DNA is so slim that it might seem impossible to us.
But the Universe is so vast it seems Infinite to us, and that Infinity makes the Slim Random Chance of DNA look not so rare. In fact the mathematical theory shows the real oddity would be no DNA at all. And that chance is not that small that we might be alone, it is large enough that DNA could've emerged several times, in several ages and several locations in the Universe.
Creating implies design and a creator.
You only need to realize that the Carbon in your butt is several billion years older than the Earth you are walking on.
So true
Finding organic compounds is one thing. Finding organic compounds organised to by the millions to communicate wnd replicate messages is something else. They are making huge leaps by acting like this is significant.
4:46 "We finally proved that components of our genetic code were in fact extra-terrestrial, and were present in a meteorite sample."
Absolutely disagree. The last part of that statement is correct: you proved that a nucleotide was present in a meteorite sample, meaning that the careful procedures prove the molecule you detected came from the space rock and not from outside contamination. But you absolutely did not prove that our genetic code is extra-terrestrial in ORIGIN. That is a giant logical leap unsupported by the evidence.
Just because you found X inside a space rock does NOT mean that ALL instances of X come EXCLUSIVELY from space rocks. That is deeply unscientific. We are finding all kinds of organic compounds throughout space (including nucleotides) leading to the conclusion that they are fairly common and their formation is energetically favorable. There is no reason to think they did not also form in abundance on the early Earth.
Life is NOT funding a way, damn it Jeff Goldblum
I think Im in love with that geneticist woman. She's so cute!
same - let's arm wrestle
evolution explains the origin of life. life exists to evolve.
so much bla bla before coming to the point I did not expect in a 5 minute video. I stopped it at 1.43 because we still got no where at that point. This is old television style from an era that people did nothing but watch tv from the sofa after work.
2:39 Murchison is a shire in WA, not a town.
2009???!
Its life ( Jim ... ) , but NOT as WE know it ( possibly ? a better explanation ) please comment ...DAVE™🛑
So it is random that life was created
*Neither the human species or ANY other species are / is LIFE ! "LIFE The Real Self" which is Non-Dimensional is "AWARENESS" and NOT Consciousness ! This is WHY, When a human is said to be Unconscious, many of the human functions continue... Consciousness is "The LINK", between "AWARENESS" and the brain ! When this "LINK" ( Consciousness ) is interrupted "AWARENESS", is separated off from the brain !*
Why is it so impossible for people to believe life started here on Earth? Is it a Biblical thing?
yes.
mostly people who think universe is 6000 years old
If our DNA inherited from that extraterrestrial rock then how the hell does that 4.6b rock end up with that DNA inside it at the first place?
Thet didn't find DNA. They found one type of nitrogen base which exists in DNA.
The point here is that the building blocks of DNA aren’t miracle substances, but are formed routinely anywhere in the universe if the raw ingredients are also around. These building blocks existed before life did.
Let me give you a direct answer: God doesn't exist. Enjoy.
Ahhh, the leapfrog
Ever heard of panspermia?
To say that DNA arises from organic compounds from outside is just a sort of kicking the can down the road...?
I think life's is extraterrestrial because the timeline of the Earth seems is so short when compared to that of the Universe. And life is so complex it might have needed asuch time as it could just like the probability of your drawing room going tidy on its own based on second law of thermodynamics
Argument from ignorance.
@@uriituw of what??
@@theblackpost2718 The time period is so short, therefore life must be extraterrestrial in origin!
I’m guessing that your background in organic chemistry and abiogenesis and probably a few other subjects is just like mine. Nothing. I think folks like you and I don’t really have “thoughts” about such topics, because we are just making it up. Haven’t a clue.
When evolution can’t explain it, let’s look to the stars and make something else up. 🤦🏽🤦🏽
It shows how easy it is fool the masses.
Life produced DNA not the inverse.
How does that work?
@@uriituw That theory comes from Donald Hoffman and his interesting mathematical premise on the preeminence of consciousness over space/time and matter
@@treich1234 Is it a theory, though?
@@treich1234 So bullsh!t
How can Eternal Life have 'origin' ?
how old are You ?
there is NO origin of Life,
and Consciousness,
Life and Consciousness,
is Eternal.
You have Never seen your Self,
what You see in mirror,
is Not older than 1½ year.
DNA is Not a steady thing,
it change by the way You live.
What are you on about?
Gibberish.
he said "some people turned to god and some others turned to stars" as if the stars weren't created by god
There’s no evidence that any god made stars.
Evidence being?
Your quip depends on the existence of a god or gods. No evidence or argument has ever been produced for a god or gods. Whereas stars exist.
Which god? There are thousands of them.
They carbon dated "al Quran=1400 years old". Does "carbon dated technology" was real?? Peace be upon us all
Are you for real?
LoL is this religious copium?
Your Qur’an is irrelevant.
Quran and other holy books all are written by human. There are so many scientific errors inside them that is pretty normal to see as they were written long time ago when humanity did not know anything about real science.
That book of fairy stories made up by a warlord with a 9 year old "wife" You mean that Koran?