never did, they just didnt have the organ that most panthers use to roar, or even anything similar.
most non-avian dinosaurs could only do deep and hissing sounds, similar to today’s crocodiles. the exceptions to that being parasaurolophus and that one ankylosaurid that might have an organ similar to the one birds use to make sounds (though still not roaring)
Well, not anymore …
never did, they just didnt have the organ that most panthers use to roar, or even anything similar.
most non-avian dinosaurs could only do deep and hissing sounds, similar to today’s crocodiles. the exceptions to that being parasaurolophus and that one ankylosaurid that might have an organ similar to the one birds use to make sounds (though still not roaring)