I'm not even going to address the complaints about scientists acting stupidly, because there's no excuse for it. This is yet another movie where the scientific method doesn't even fucking exist, and the characters all have "Doctor" plastered in front of their names to make them seem more interesting.Hammeroj said:The barrage of stupid doesn't end there. After that, they check out the alien's DNA, and it turns out... It's exactly like ours! "But wait a minute", I hear you say - "Why is that stupid?" Well, it's simple. The aliens aren't quite like us, and if that were to be reflected anywhere, it's in their DNA. And it may or may not make zero sense on another level, depending on when the "seeding" of humans happened. If it were right at the edge of prehistory, fine, but the further you move back, the more change evolution would've effected on us. So if it happened something like 200,000 years ago, there would be quite some difference between the DNA of a human today and back then, which means the DNA of the alien and the human couldn't match on a whole 'nother level. And if it did happen right at the edge of prehistory, shouldn't it have happened many, many times to seed us to all the different places like Asia and Africa and Europe, given that we wouldn't be dealing with time periods as big as dozens of thousands of years?
I would like to call into question the whole idea of this human-only-panspermia without even taking into account all the evidence of evolution in the form of genetics and archaeological findings. And I'll do this in a single question, because this is already getting really ranty and TL;DR. How, exactly, is a creature being dissolved into genetic material (maybe not even that, because we see the actual DNA strands getting dissolved too, so who the fuck knows) going to create more creatures like it?
However, the DNA stuff in the movie isn't much of a stretch. Through modern DNA testing we know that evolution is an absolute, and can trace evolution down to the smallest biological elements. That element being DNA.
The mystery is why, in a universe where physical law dictates that everything falls apart and reaches a state of LESS complexity, would chemicals suddenly self-organize and do it in a way that codes for them to be able to do it again. This is the mystery of life we're still trying to figure out.
I guess Ridley Scotts' idea is that an alien race uses it's own DNA and some biotech to seed a new planet with DNA. At it's most basic level, DNA isn't going to just self-organize into something like a human. It's going to go through it's whole multibillion year evolution, and it's going to come up with things like bacteria, fish, insects, etc. It's going to adapt to it's surroundings. Finally, it produces a sentient creature, genetically identical to it's "parent" race. Remember, when we see the earth at the beginning of the movie, it isn't just before humans. It seems to be devoid of ANY life. Our best theories as to how DNA formed and life began on earth are basically "Extreme conditions forced molecules to combine in unlikely ways" or "DNA/Bacteria from another planet seeded life on earth". So Scotts' ideas on the subject aren't even that far fetched.
Also, as a slight defense of the ludicrously dumb biologist in the movie: look up Percy Fawcett.
He was an archaeologist who was an inspiration for the character Indiana Jones. The last time anyone saw him, he was going deep into the Amazon, asking local tribes to help him find the "Lost City of Z". He knew there were warring cannibal tribes in this unexplored portion of the Amazon, as well as the most dangerous animals imaginable, but he still did it. Immediately after he set off, he disappeared. Sometimes scientists do stupid, irrational things, and get killed by something they don't even understand.