Start evolution over. Would the same species appear? Yes!
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21-07-2013, 08:57 AM
Start evolution over. Would the same species appear? Yes!
I've seen the question raised on the forum "If all life were wiped off the planet, would humans evolve again?" I've always felt that this was probably true. Here's a news blurb that suggests it is possible.

July 19, 2013 — If you could hit the reset button on evolution and start over, would essentially the same species appear? Yes, according to a study of Caribbean lizards by researchers at the University of California, Davis, Harvard University and the University of Massachusetts. The work is published July 19 in the journal Science.

http://www.sciencedaily.com/releases/201...104931.htm
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21-07-2013, 09:02 AM
RE: Start evolution over. Would the same species appear? Yes!
(21-07-2013 08:57 AM)Grassy Knoll Wrote:  I've seen the question raised on the forum "If all life were wiped off the planet, would humans evolve again?" I've always felt that this was probably true. Here's a news blurb that suggests it is possible.

July 19, 2013 — If you could hit the reset button on evolution and start over, would essentially the same species appear? Yes, according to a study of Caribbean lizards by researchers at the University of California, Davis, Harvard University and the University of Massachusetts. The work is published July 19 in the journal Science.

http://www.sciencedaily.com/releases/201...104931.htm

No. Absolutely not.

There would obviously be species to fill niches, but the DNA would be different.

The probability that the same sequences arise twice is an absurdly tiny number.

Skepticism is not a position; it is an approach to claims.
Science is not a subject, but a method.
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21-07-2013, 09:04 AM
Start evolution over. Would the same species appear? Yes!
Dinosaurs would rule the earth!

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21-07-2013, 09:16 AM
RE: Start evolution over. Would the same species appear? Yes!
What Chas said...

You can't start in 2103 what began in the Devonian and expect the same results. The geological events just wouldn't like up and you might have intelligent lizards, or flowers that can eat you... You would need perfect controls down to the individual mutations, every single prey capture event, every single slip up, every pollinated flower, every fallen tree...even on the chemical level where mutations are occurring. Otherwise you might get similar niches and features but not the same species...no way.

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21-07-2013, 11:49 AM
RE: Start evolution over. Would the same species appear? Yes!
If starting from a primitive cell, the only thing that we could be sure of happening would be development of unique single-celled organisms. We only know life evolved past single-celled organisms once, and it took billions of years to get there. If we started a new strain of life from a new first cell, it could take half as long, ten times as long, or never happen at all.

If we went back in time and ran Simulation Earth again, we would have a very different chain of events. Even tiny events like a dinosaur eating a different shrew-thing one day would mean that entire lines could be destroyed. The death of a single individual could mean mammals as we know them never developed.

When you take the huge impact of such a minor event into consideration and apply it to billions of years of single-celled organisms, it becomes clear that the evolution of an entirely new strain of life would be anything but predictable.

If something can be destroyed by the truth, it might be worth destroying.

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21-07-2013, 12:21 PM
RE: Start evolution over. Would the same species appear? Yes!
I don't think this is to say that evolution follows a path but it tends to thrive where and however it can. Like random mutations is life's way of throwing shit on the wall and seeing what sticks. If it gains a foothold the mutations still persist. The ape shape, if you will, works pretty well and it most likely would at some point if it all happened again. The real question is would this apply elsewhere in the universe?
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21-07-2013, 12:40 PM
RE: Start evolution over. Would the same species appear? Yes!
(21-07-2013 12:21 PM)Grassy Knoll Wrote:  I don't think this is to say that evolution follows a path but it tends to thrive where and however it can. Like random mutations is life's way of throwing shit on the wall and seeing what sticks. If it gains a foothold the mutations still persist. The ape shape, if you will, works pretty well and it most likely would at some point if it all happened again. The real question is would this apply elsewhere in the universe?

Would what apply? Evolution?

The current thinking is that evolution is universal. No other process is known to have the power.

Skepticism is not a position; it is an approach to claims.
Science is not a subject, but a method.
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21-07-2013, 12:46 PM
RE: Start evolution over. Would the same species appear? Yes!
The earth had a couple of mass-extinction events that changed the course of evolution, so you'd have to account for that factor...
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21-07-2013, 01:39 PM
RE: Start evolution over. Would the same species appear? Yes!
I'm agreeing to disagree with the thread title. As Chas pointed out, niches will be filled in a similar way that they have been. There would be predators, prey, scavengers, plants, symbiosis, parasites, etc. But the random mutation and variation would be different, thus making the environmental filters different, then resulting in different species than what we have today. Life would still adapt to occupy every habitable environment as it does now, but differently.

Even if you took the current biosystem, eliminated the humans (with a zombie virus, no doubt), it is highly improbable that another primate species would step up to fill our missing niche. While they have relative intelligence, they lack the population and biodiversity to make adaptations necessary.

Bottom line: the specific species that exist on Earth is a one-time occurrence.

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21-07-2013, 01:53 PM
RE: Start evolution over. Would the same species appear? Yes!
You'll get creatures filling equivalent niches, but in no way would you ever get the same species.

E 2 = (mc 2)2 + (pc )2
614C → 714N + e + ̅νe
2 K(s) + 2 H2O(l) → 2 KOH(aq) + H2 (g) + 196 kJ/mol
It works, bitches.
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