An international team analyzed the genetic material decay rate of DNA extracted from an extinct MOA skeleton fossil and found that although the short DNA fragment may exist for 1 million years, the half-life of 30 or more base pair sequences under certain conditions is only about 158000 years
Environmental factors will affect the decay rate of genetic materials such as DNA
 According to this, a scientist believes that reconstructing dinosaurs with ancient DNA is similar to the story of the film Jurassic Park is impossible to happen