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            are crocodilians and birds, and we can look to the ways they vocalize to give us a hint.

            Alligators and crocodiles use their larynxes to communicate—they’ll hiss, groan, and yes, roar (here’s a compilation of their sounds). Dinosaurs might have had larynxes, but since those don’t fossilize, it’s impossible to know for sure. Birds, meanwhile, use an organ called a syrinx, which seems to have evolved after dinosaurs. That might indicate that dinos couldn’t vocalize at all, which would be a bummer.

            However, there’s also a possibility that they evolved a unique way to vocalize. For example, based on studying their skulls and inner ears, some have theorized that used their crests to bellow at each other.

            So, they probably didn’t roar, but bellowing can be pretty cool too, right?

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            David Jackson
            2 days ago

            We don't have any complete CD's, but from some old reel-to=reel tapes, they sounded pretty good in the shower. No stage presence, tho.

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            joshmo
            1 day ago

            we somewhat do, but it is only an educated guess... but its close enough

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            Anonymous
            9 hours ago

            yes, they sound like your mother.

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            Anonymous
            6 hours ago

            they don't know.

            They're making hypotheses (educated guesses) of these reptilian titans