Sunday, January 26, 2014

Origin of Life?


One of the questions that's been annoying me for years is this: What is the point with life?
Not "what's the point" in any general or philosophical way, but literally: What IS the point?
And don't bother bringing God into this. It's a whole other discussion, and I'd be happy to take that up later, but for now I'm on another mission.

Because what is the point with life?

Everything else in the universe seems to fall into some patterns or laws, which gives some kind of purpose. Gasses come together and form giant clouds that becomes structures that becomes stars and planets - all bound by laws of physics. The planets are kept orbiting stars, stars orbiting the galaxy etc. It makes kind of sense! It's there because it cannot not be there! It's a kind of universal evolution. I'm probably speaking against better knowledge, but then I'd love to be educated. Life doesn't seem to follow laws as such. It's just a byproduct - something that accidentally popped up on this tiny cockwheel in the universal clockwork.

So how did life come to be? Is it a physical reaction of chemicals and lightning, or a freak accident?



A young MIT scientist, Jeremy England (By the way - isn't that just the coolest name for a science guy ever?) has come up without very interesting thesis: Life evolved out of a necessity on an atomic scale:
"From the standpoint of physics, there is one essential difference between living things and inanimate clumps of carbon atoms: The former tend to be much better at capturing energy from their environment and dissipating that energy as heat. 
Jeremy England, a 31-year-old assistant professor at the Massachusetts Institute of Technology, has derived a mathematical formula that he believes explains this capacity. The formula, based on established physics, indicates that when a group of atoms is driven by an external source of energy (like the sun or chemical fuel) and surrounded by 
a heat bath (like the ocean or atmosphere), it will often gradually restructure itself in order to dissipate increasingly more energy. 
This could mean that under certain conditions, matter inexorably acquires the key physical attribute associated with life."   
He states that the origin and evolution of life are processes driven by the fundamental laws of nature — namely the Second Law of Thermodynamics. He's come up with a formula showing how a group of atoms, when driven by an external source of energy (like the sun) and when surrounded by a heat bath (like the ocean or atmosphere), can sometimes restructure itself as a way to dissipate increasing rates of energy.

So, according to the Jeremy England, the origin and subsequent evolution of life follow from the fundamental laws of nature and “should be as unsurprising as rocks rolling downhill.”

“You start with a random clump of atoms, and if you shine light on it for long enough, it should not be so surprising that you get a plant,” England continous.
The thesis has gained a lot of response from the scientific community - responses reaching from  "interesting" to "absurd" and "pure speculation."
I'd go with "interesting" here, because it kind of makes sense to me. 
Of course, this planet could for all we know be the only one with any kind of life on it. We might just have to face the fact, that we are alone in this universe. But it would be odd, wouldn't it?

I guess that if the theory of Jeremy England is true, chances on finding traces of life on Mars just got beefed up...
Wanna know more? //www.simonsfoundation.org/quanta/20140122-a-new-physics-theory-of-life/

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