A new analysis confirms the widely held suspicion that DNA from dinosaurs and ancient insects trapped in amber cannot be recovered to make a 'Jurassic Park'-style theme park
After cell death, enzymes start to break down the bonds between the nucleotides that form the backbone of DNA, and micro-organisms speed the decay
DNA has a half-life of 521 years.That means that after 521 years, half of the bonds between nucleotides in the backbone of a sample would have broken; after another 521 years half of the remaining bonds would have gone; and so on
The team predicts that even in a bone at an ideal preservation temperature of −5 ºC, effectively every bond would be destroyed after a maximum of 6.8 million years.The DNA would cease to be readable much earlier — perhaps after roughly 1.5 million years, when the remaining strands would be too short to give meaningful information.
....examined 158 DNA-containing leg bones belonging to three species of extinct giant birds called Moa...