The most abundant remains of dinosaurs are their fossilized bones. Therefore, dinosaur bones are the most obvious place to look for dinosaur DNA. Bones haven't as good preservation properties as ice or amber. Nonetheless, DNA has been recovered from 300,000 years old unfrozen bone specimens. Multiple scientists have claimed to extract DNA from dinosaur bones. However, most scientists believe DNA can't last 65 million years in bones. The discovered DNA could be contamination.
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