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We believe that these dinosaurs were very communicative. They even produced and perceived low-frequency sounds like those made by elephants, which travel several kilometers and are imperceptible to humans, says palaeobiologist Angel Alejandro Ramirez. “We know that they had ears with the ability to receive low-frequency sounds, so they must have been peaceful but talkative dinosaurs. Some paleontologists theorize that they emitted loud sounds to scare off carnivores or for reproduction purposes, which suggests that the crests wore bright colors,” said Ramirez.  The skull of the new dinosaur in Mexico and its distinctive Tlatolophus crest bone. (Juan Miguel Contreras, technical photographer, Institute of Geology /

United statesUnited kingdomPresa de san antonioCerro del puebloCoahuila de zaragozaAntropologiae historiaJuan miguel contrerasAngel alejandro ramirezInstitute of geologyNational institute of anthropologyMinistry of cultureNational autonomous university of mexicoCretaceous researchNational instituteNational autonomous universityCerro del pueblo formation