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What was the purpose of nest for Parasaurolophus

Have you ever see the movie 'Jurassic park?' This movie is about people restored dinosaurs by DNA of mosquitoes which were prisoned in ambers. Anyway, in the movie, there are many species. And today, I want to have a conversation about Parasaurolophus. Most people don't know the name of these dinosaurs, but they know this species when they see them.
As you can see, they have crests. But what do they use this for? There are many theories from scientists. I'll introduce two famous theories.
The first theory is they use it for an organ that can breathe in shallow water. But this theory was fell into disuse because it turned out there aren't any holes and their lifestyle on land.
The next theory is they use their crests as resonance tubes. The crest of the head is an empty structure, so air can pass by. For this reason, there was a theory that assumed that it was a kind of breathing hole role mentioned earlier, but current research has shown that air circulates internally without escaping. Therefore, some say that the sound was amplified using the crest to communicate with other individuals.
So far, the exact function of this crest has not been shown. What do you think?

Have you ever seen the movie 'Jurassic Park?' This movie is about people restored dinosaurs by DNA of mosquitoes which were prisoned in ambers. Anyway, in the movie, there are many species. And today, I want to have a conversation about Parasaurolophus. Most people don't know the name of these dinosaurs, but they know this species when they see them.
As you can see, they have crests. But what do they use this for? There are many theories from scientists. I'll introduce two famous theories.
The first one is they use it for an organ that can breathe in shallow water. But this theory was fell into disuse because it turned out there aren't any holes and their lifestyle on land.
The next theory is they use their crests as resonance tubes. The crest of the head is an empty structure, so air can pass by. For this reason, there was a theory that assumed it was a kind of breathing hole role mentioned earlier, but current research has shown that air circulates internally without escaping. Therefore, some say that the sound was amplified using the crest to communicate with other individuals.
So far, the exact function of this crest has not been shown. What do you think?


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