There is an interesting theory that creatures on different planets would be no much different than already very variable creatures on Earth. Reason given was that rules of physics are same everywhere resulting in creatures developing similar design features.
Of course that would be true for all carbon-based creatures. For non-carbon creatures the story would most likely be different though.
it's called Convergent Evolution http://en.wikipedia.org/wiki/Convergent_evolutionHmm, so out of all possible permutations of DNA the results would be just as similar as on the Earth?
NMS BBC coverage from E3, they seem to like it:
How UK indie No Man's Sky 'won E3' http://www.bbc.co.uk/news/technology-27807167
Still looks a bit cartoon for me...
G
yeah, talk of big game hunting on previous dev diary for future expansion and then seeing dinosaurs procedually generated means I can't wait to bag a brontosaurus
Hmm, so out of all possible permutations of DNA the results would be just as similar as on the Earth?
For carbon based lifeforms on a planet similar to our earth, yes.
But 'similar' is very relative. There are so many hugely different species on this planet alone and don't forget that 99% of all species on this planet are estimated to be extinct.
You will never see the exact same species on alien planets as on our planet. If evolution would reboot on this planet the chance that the human primate would re-emerge is nill.
We are used to flora and fauna and fungi for example, but on an alien planet these biota might never evolve like that at all. It might be a completely new form of carbon based life. One might encounter a form of fast moving, hunting plant life, or planets where billions of types of poisonous fungi conquered the entire planet eradicating everything else. Nearly anything can happen during an evolutionary process. There is no master plan.
And I am only talking about carbon based life forms. Imagine something completely different evolving for billions of years. We might not even recognize it as life. It might be the smartest and most benign thing in the universe, and we might kill it involuntary by squishing it with our landing gear.
But in science there is also that idea that maybe life always finds the best way to do things. And maybe the human body, having two legs and two arms and one head with two eyes and two ears and one mouth is exactly THAT best way. Therefore some scientists think that it's possible that life forms on other planets might also have resulted in a very human like species.
No that is not how evolution works and there is no such idea in science.
Evolution does not find the best way to do things, because there is nobody searching .
An evolutionary process results in stuff that can survive and procreate. That is all there is to it. Very often evolution's 'solutions' are very mediocre and it produces stuff no intelligent engineer would ever design that way, because it is just not very good from a designer point of view. The human body is riddled with examples of that kind of mediocrity, but so are other lifeforms on this planet.
There is no such thing as progress in evolution, there is also no purpose, and no direction. These are fundamental tenets of evolution. Evolution is not about progress, but about change. And change just happens in biological lifeforms. It is unstoppable. It might even cause extinction because what works, or is survivable in one situation is a killer in another.
Evolution does not strive to produce human-like beings, because that is not the best way to survive at all. That is why in hard numbers and adaptional prowess for example bacteria are much more successful than humans, so are insects. In evolution the best way... is just mere survival to reproduce. That is all it is.
Evolution does not care about intelligence for example. Intelligence is no requirement at all. In current evolutionary biology it is considered a byproduct. Other primates do just fine without writing books, driving cars and building genocidal weapons. Intelligence is just one of the countless many traits than can perhaps assist in a minor way the survival of some species, especially when they are super weak like those human squishy water bags we are. But it is no coincidence that on a planet with many millions of species only one developed the intelligence we have. And just look at the mess we make of the planet we depend upon. One could easily make the point that human intelligence is just a terrible self-defeating evolutionary accident, because we are the filthiest most destructive and abusive species that ever walked the planet. Dinosaurs 'ruled' the earth for more than 120 million years! I sincerely doubt we will beat that record.
Thinking humans and their design are special, is like thinking there is something 'special' about the particular blade of grass your ball lands on when you tee off at the golf course.