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Can Evolution ever return dinosaurs?



Have you seen the 1993 Jurassic Park movie and wondering, "Can this really happen? Can the dinosaurs ever come back?" The idea that these mighty creatures could once again walk on Earth some day is for most people both fascinating and terrifying.

Even real-life scientists are intrigued whether the evolutionary process can bring us back to the Tyrannosaurus. Susie Maintmont, a spy paleontologist at London's Natural History Museum, quickly rejected the idea that a mosquito filled with DNA stored in amber for millions of years could help recreate the missing

"We have mosquitoes and biting flies from the time of the dinosaurs and they keep in amber, "says a Maidment statement. "But when the amber keeps things, it tends to keep the scales, not the soft tissues. So mosquitoes do not store blood in amber. Researchers have found blood vessels and collagen in the fossils of dinosaurs, but these components do not have a real DNA dinosaur in them. Unlike collagen or other healthy proteins, DNA is very fragile and sensitive to the effects of sunlight and water. The oldest DNA in fossil mining is about 1

million years old, and dinosaurs have died about 66 million years ago.

Maidment adds, "Although we have something that seems to be mosquito blood up to 50 million years old,

Jamal Nasser, a genetics scientist at Northampton University in the UK, said he would not rule out the idea of ​​dinosaurs developing from the dead, according to him, evolution is not fixed or planned, in other words everything can happen. "Evolution is largely stochastic [randomly determined] and evolution does not necessarily go forward, it can have several directions. , pointed out Nasser, the right conditions must exist to be on "It is clear that one can imagine viral pandemics that could disrupt our genomes, our physiology and behavior beyond our control," he said live, which in turn could create the right conditions "We can see an animal that is closely related to a similar ecological niche – for example, the Ichthyazars are marine reptiles with long sharp snouts and dolphin-like body shapes tails, "she said. "Today we see the dolphin, and they probably occupy a similar ecological niche, but we would not describe the dolphin as a ichthyosaur because they have no anatomical characteristics that allow them to be ichthyoses." [What If a Giant Asteroid Had Not Wiped Out the Dinosaurs?]

In addition, dinosaurs have never disappeared first, said Maintant. Birds have evolved from dinosaurs that eat meat, and thus in a strict biological definition, everything that has developed from this common ancestor is a dinosaur sharing the same anatomical characteristics, she said.

"Dinosaurs are still with us," said Maintant. "The dinosaurs are said to have disappeared, but only non-bird dinosaurs have disappeared.Birds are dinosaurs and birds are still developing, so we will certainly see new species of birds that are developing – and that will be new types of dinosaurs . " Some scientists even deal with the evolutionary process by trying to turn the engineer chicken into a dinosaur called the "pilaser." But this beast, if ever, would not be a copy of a dinosaur, but rather a modified chicken, explained Jack Horner, a research associate at the Burk Museum at Washington University. Things have changed dramatically for 66 million years, and if one day a dinosaur has evolved back to Earth, it will be in a completely different world. "An animal that disappeared naturally, maybe 150 million years ago, does not go to recognize something in this world if you bring it back," Maidment noted, "What will he eat when the grass did not evolve then? "What is its function, where do we put it?"

So, perhaps, it's best to let dormant dinosaurs lie, she said.

Originally posted on Live Science .


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