All data from fossils and experiments to date suggests that DNA is simply unlikely to survive for tens of millions of years. Even if scientists did find DNA fragments in dinosaur fossils, these would probably be very short.
Scientists estimate that the final best by date for DNA is about a million years after an organism's death, and that's only under the exact right conditions. We're about 65 million years too late for retrieving viable dinosaur DNA.
Why is Jurassic Park not possible in real life? Short answer: DNA is fragile. The best preserved situation for DNA is frozen underground and even then complete DNA strands are at best numbered in tens of thousands of years.
Dinosaurs are still with us, in the form of birds. But could the more canonical dinosaurs, like Tyrannosaurus, Triceratops and Stegosaurus, evolve again, if the climate and temperature switched back to what the conditions were like during the Cretaceous? Probably not.
The Jurassic Park franchise's dinosaurs are not at all scientifically accurate. The first film was decent for 1993, but the sequels did not improve the accuracy - they did the exact opposite.
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Is Jurassic Park theoretically possible?
Ultimately though, we need intact DNA to resurrect species. So, although scientists have made a lot of progress, the prospect remains in the realm of science fiction. All data from fossils and experiments to date suggests that DNA is simply unlikely to survive for tens of millions of years.
Jurassic Park and Jurassic World were theme parks, not a zoo, so InGen scientists were not obligated to present real dinosaurs. The attendees and creators only wanted to be thrilled, so they designed the dinosaurs with a focus on being cooler as opposed to real.
Many of them probably could survive today. Dinosaurs ruled the world for 150 million years, and endured hot and cold spells, volcanic eruptions, and changing sea levels. There is nothing about today's world that would be fatal to them.
The non-avian dinosaur part of the evolutionary tree went extinct about 66 million years ago, likely due to a catastrophic event such as an asteroid impact, leaving no real dinosaurs alive today except for their bird descendants.
According to Reiner, it is unlikely that dinosaurs could have ever evolved cognitive abilities comparable to ours. A little bit of anatomy is needed here. Over 350 million years of separate evolution, mammals and dinosaurs found two rather different ways to organize cognitive functions.
Even with new collection technologies, under the best possible conditions, the limit of DNA survival is perhaps 1 million years. The last of the dinosaurs went extinct 65 million years ago, so Jurassic Park likely won't become a reality anytime soon.
Gizmodo reports the oldest sequenced DNA belongs to a million-year-old woolly mammoth. DNA is a relatively fragile molecule, and dinosaurs went extinct 65 million years ago, so the idea of sequencing DNA from these ancient creatures has so far remained science fiction.
It's the same place where Hammer and colleagues found Antarctica's first dinosaur in 1990 — the 22-foot, meat-eating Cryolophosaurus, or "frozen crested reptile." Hammer found more parts of that dinosaur as well as a large sauropod, or plant-eater, resembling a diplodocus, and the new, as-yet-undescribed ornithischian.
Maybe one of them is the Carcharocles megalodon. Are scientists trying to bring back a form of the Megalodon? No. Not only is that not really possible, given we have no Megalodon DNA to work with, but why would we do that?
It's not possible to bring back the dodo, even if it becomes possible to build a bird with a dodo genome. Beyond behavior, the dodo proxy must survive in a world that is significantly different from that of more than 300 years ago, when the dodo went extinct.
What could go wrong? A company aiming to bring extinct animals back from the dead said it has taken an elephant-sized step toward genetically resurrecting the woolly mammoth, a wild if contentious goal to repopulate the Arctic tundra with a missing titan.
God told Noah, “And of every living thing of all flesh, two of every sort shalt thou bring into the ark, to keep them alive with thee; they shall be male and female” (Genesis 6:19). A few small dinosaurs would have been on the ark. The larger species of dinosaurs were probably young and smaller on the ark.
DNA degrades over time, and it is highly unlikely that intact dinosaur DNA has survived the millions of years since their extinction. The third method, genetic engineering, is the most plausible yet the most complex. It involves editing the genes of a closely related species to resemble those of the extinct species.
Between 850 and 600 million years ago, oxygen concentrations increased steadily from 2 to about 10 per cent: still not enough for humans to survive on. Fast forward to 400 million years ago and you could just about breathe but might feel dizzy and confused on about 16 per cent oxygen.
Very hot. During this Mesozoic Era — from about 250 to 66 million years ago — the concentrations of CO2 in the atmosphere were around 16 times higher than now, creating a "greenhouse climate” with temperatures on average six to nine degrees warmer than today.
Would humans exist if dinosaurs didn't go extinct?
“If we speculate that humans had evolved alongside dinosaurs, then they probably would have been able to co-exist,” says Farke. “Humans already evolved in ecosystems that had large land animals and predators. We probably would have done okay.”
Nope. A team of researchers tried to extract DNA from a couple of bees caught in tree resin that wasn't even hardened into amber yet — and they couldn't do it. It turns out that amber (and resins in general) aren't great at preserving DNA.
Dinosaurs and other ancient creatures obviously hunted and fell prey to each other just like wild animals still do. They fought over mates or scarce resources and sometimes suffered horrible injuries that can still be seen in their fossil bones.
Why can't we make dinosaurs like in Jurassic Park?
Bottom line: We can't recreate dinosaurs from their DNA because the DNA no longer exists. DNA disintegrates in about 7 million years, and dinosaurs lived 65 million years ago.
