Name: Jack Horner: Dinosauri mutaforma
Uploaded: 2012-02-09T15:59:58Z
Duration: 18 min 6 s
Description: Dove sono i cuccioli di dinosauro? In un affascinante discorso a TEDxVancouver il paleontologo Jack Horner descrive come sezionando crani fossili abbia rivelato segreti scioccanti su alcuni dei nostri amati dinosauri.

Jack Horner: Jack Horner: Dinosauri mutaforma

Jack Horner: Dinosauri mutaforma

Dove sono i cuccioli di dinosauro? In un affascinante discorso a TEDxVancouver il paleontologo Jack Horner descrive come sezionando crani fossili abbia rivelato segreti scioccanti su alcuni dei nostri amati dinosauri.

Many classic dinosaur species are actually just the young or adolescent forms of others, mistaken for adults because of dramatic changes as they grew. Museums collected only the biggest fossils, so baby dinosaurs seemed to vanish. Bone analysis reveals that some dinosaurs, like Triceratops and Pachycephalosaurus, were mislabeled as multiple separate species when they were really just growth stages of the same animal. This discovery rewrites the dinosaur family tree and shrinks the cast of prehistoric giants.