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[BBC] Classic 'life chemistry' experiment still excites

post #1 of 18
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http://www.bbc.co.uk/news/science-environment-12813081

Quote:
Modern analyses of samples archived from 1950s experiments indicate the gas can, under the right conditions, play a role in reactions that produce some of the building blocks of biology - amino acids, which combine to make proteins.
Sorry about the format its my first news post. Pretty cool how we may have came from essentially swap gas and electric charge!
    
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post #2 of 18
Quote:
When his experiments resulted in the production of amino acids, it was a startling discovery.
When his experiments did exactly what he predicted they would do through careful groundwork, it was startling?
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post #3 of 18
Thread Starter 
Aaaah cheers, wasnt sure how to quote something that I hadn`t highlighted.
    
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post #4 of 18
Quote:
Originally Posted by MrDeodorant View Post
When his experiments did exactly what he predicted they would do through careful groundwork, it was startling?
I'm confused by your post. Are you criticizing him for conducting rigged experiments?

This is how the scientific method works.

1. Make hypothesis about what will happen in an experiment.
2. Run experiment.
3. Observe results.
4. Confirm or debunk original hypothesis based on observed results.

Miller's hypothesis was that primordial gasses and electricity could produce molecules essential to biology. His experiment confirmed his hypothesis.
    
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post #5 of 18
wasn't this discredited due to organinc amino acids being left handed (or right handed, i can't remember) in the way they branched and the experiment resulted in amino acids that were oriented the opposite way?

And hasn't the theorized chemical make up of the early earth atmosphere been changed to levels that wouldn't have allowed this to happen?
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post #6 of 18
Thread Starter 
^^^ because thinking you know whats going to happen, doesnt mean you know exactly how its going to happen, and its only a prediction at the end of the day.It still doesnt take away from what an exeptional discovery it was. You might know whats happens in a car crash but im sure it still going to startle you when your brains are all over the car

Im sure it doesnt really matter what tyoe of amino acids are produced, anyone with a brain know that amino acids are amino acids, hence the building blocks of life where created. Only a religion would try and blindly argue against solid evidence like so, clutching at any slight chance the discoverys that drive us forward are incorrect.
Edited by Juliancahillane - 3/22/11 at 1:13pm
    
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post #7 of 18
Quote:
Originally Posted by Epitope View Post
I'm confused by your post. Are you criticizing him for conducting rigged experiments?
No, I'm saying it shouldn't have been (and wasn't) particularly startling.
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post #8 of 18
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I would say his prediction was more of a guess, since the whole "life origins" topic is still widely confused by people who are loosing grip on reality, an those who dont want to rock the boat with said people
    
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post #9 of 18
Quote:
Originally Posted by stumped View Post
wasn't this discredited due to organinc amino acids being left handed (or right handed, i can't remember) in the way they branched and the experiment resulted in amino acids that were oriented the opposite way?

And hasn't the theorized chemical make up of the early earth atmosphere been changed to levels that wouldn't have allowed this to happen?
I've heard that too. Also, there are thousands of amino acids, most of which are poisonous to life, and only 20 that are actually useful in life. IIRC his experiment didn't produce the kind of amino acids life uses, plus they were evenly left-and-right handed while amino acids used in life are uniformly left-handed.

As far as the atmosphere, supposedly scientists have decided (based on gas samples from various rock layers) that Earth has always had significant levels of oxygen in the atmosphere. Somehow the presence of oxygen prevents Miller's experiment from producing any amino acids.
post #10 of 18
Thread Starter 
Well its evidence enough for me that life can start from a collection of molecules which eventially, in all the billions of years they co exist, can spark life given the correct circumstances. Those circumstances we may never know, and as little the probability may seem, thers still the chance and people do win the lottery
    
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