Nobody today has ever seen a dinosaur in real life. We may have seen museum models and illustrations, but we don't know if dinosaurs really looked like that.
The best skeletons are only 90% complete, and even specialists called paleoartists have to make informed guesses.
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Small structures named melanosomes vary in colour depending on their shape: Black ones are sausage-like, and reds are round. A well-preserved M.guid feather shone raven. Nanostructures also suggest it had an iridescent sheen.
Close relatives to the T. rex have protofeathers on their heads, backs, and tails, suggesting that the T. rex may have had too.
Dinosaurs first appeared between 247 and 240 million years ago. An extinction event wiped them out 65,5 million years ago, except for the avian dinosaurs.
Scientists think the extinction was likely because of an asteroid impact, chemicals from erupting volcanoes, climate change and other factors.
In 1993, Newsweek ran an article affirming the scientific plausibility of Jurassic Park. They pointed out that two Berkeley scientists announced that they had cloned 40m-year-old bee DNA after finding the insect preserved in amber.
But to replicate a dinosaur genome, you would need billions of DNA building blocks. They could not harvest more than 250. Moreover, the amber-based experiments of the bee DNA finding were likely based on false results. Lastly, no one has ever found any dinosaur DNA since DNA degrades over time.
People have always known about dinosaurs but called them by different names.
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